Category:OEIS Articles
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Pages in category "OEIS Articles"
The following 200 pages are in this category, out of 654 total.
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- Definition:Abundant Number/Sequence
- Definition:Ackermann Function/Mistake 1
- Definition:Aliquot Sum/Sequence
- Definition:Almost Perfect Number/Sequence
- Alternating Groups that are Ambivalent
- Definition:Amicable Pair/Sequence
- Definition:Angle/Unit/Degree
- Definition:Angle/Unit/Radian
- Approximate Relations between Pi and Euler's Number/e to the pi root 163
- Approximate Relations between Pi and Euler's Number/Fanelli's Approximation
- Approximation to Power of 7 by Power of 10
- Approximations to Equilateral Triangles by Heronian Triangles
- Definition:Apéry's Constant
- Definition:Artin's Constant
- Definition:Automorphic Number/Sequence
B
- Definition:Balanced Prime/Sequence
- Definition:Bell Number/Sequence
- Definition:Bernoulli Numbers/Archaic Form/Sequence
- Definition:Bernoulli Numbers/Sequence
- Talk:Best Approximation from Below to 1 as Sum of Minimal Number of Unit Fractions
- Binary Logarithm/Examples/10
- Definition:Biquadrate
- Definition:Bloch's Constant
- Definition:Bloch's Constant/Historical Note
- Definition:Brun's Constant
C
- Definition:Carmichael Number/Sequence
- Definition:Catalan Number/Sequence
- Definition:Catalan's Constant
- Definition:Centered Hexagonal Number/Sequence
- Central Binomial Coefficient/Sequence
- Definition:Champernowne Constant
- Definition:Chen Prime
- Collatz Conjecture/Examples/27
- Common Logarithm/Examples/2
- Common Logarithm/Examples/3
- Common Logarithm/Examples/e
- Common Logarithm/Examples/pi
- Complete List of Special Highly Composite Numbers
- Composite Fibonacci Numbers with Prime Index
- Consecutive Integers whose Product is Primorial
- Consecutive Integers with Same Euler Phi Value
- Consecutive Integers with Same Sigma
- Consecutive Powerful Numbers
- Continued Fraction Expansion of Euler's Number
- Continued Fraction Expansion of Euler's Number/Convergents
- Continued Fraction Expansion of Fourth Power of Pi
- Continued Fraction Expansion of Golden Mean
- Continued Fraction Expansion of Irrational Square Root/Examples/13
- Continued Fraction Expansion of Irrational Square Root/Examples/13/Convergents
- Continued Fraction Expansion of Irrational Square Root/Examples/2
- Continued Fraction Expansion of Irrational Square Root/Examples/29
- Continued Fraction Expansion of Irrational Square Root/Examples/29/Convergents
- Continued Fraction Expansion of Irrational Square Root/Examples/61
- Continued Fraction Expansion of Irrational Square Root/Examples/61/Convergents
- Continued Fraction Expansion of Pi
- Continued Fraction Expansion of Pi/Convergents
- Definition:Copeland-Erdős Constant
- Count of Binary Operations on Set/Sequence
- Count of Binary Operations with Fixed Identity
- Count of Binary Operations with Identity/Sequence
- Count of Binary Operations Without Identity
- Count of Commutative Binary Operations on Set/Sequence
- Count of Commutative Binary Operations with Fixed Identity
- Count of Commutative Binary Operations with Identity
- Definition:Cube Number/Sequence
- Cube Root/Examples/2
- Cube Root/Examples/3
- Cube Root/Examples/5
- Cubes which are Sum of Three Cubes
- Definition:Cubic Recurring Digital Invariant/Sequence
- Definition:Cullen Number/Sequence
- Definition:Cullen Prime/Sequence
D
- Decimal Expansion of Fourth Power of Pi
- Definition:Deficient Number/Sequence
- Definite Integral from 0 to 1 of x^4 (1 - x)^4 over (1 + x^2)
- Densest Packing of Identical Circles
- Dissection of Polygon into Triangles with Chords
- Dissection of Polygon into Triangles with Chords counting Isometries
- Divisor Counting Function/Examples/105
- Divisor Counting Function/Examples/108
- Divisor Counting Function/Examples/110
- Divisor Counting Function/Examples/60
- Divisor Counting Function/Table
- Definition:Dottie Number
- Du Bois-Reymond Constants/Example/Second
E
- Help:Editing
- Help:Editing/House Style
- Help:Editing/House Style/Sources
- Definition:Eighth Power
- Definition:Emirp/Sequence
- Equal Consecutive Prime Number Gaps are Multiples of Six
- Equivalence Class/Examples/Months that Start on the Same Day of the Week
- Definition:Euclid Number/Sequence
- Definition:Euclid Prime/Sequence
- Euler Lucky Number/Examples/11
- Euler Lucky Number/Examples/17
- Euler Lucky Number/Examples/41
- Euler Lucky Number/Examples/5
- Euler Lucky Number/Sequence
- Definition:Euler Numbers/Alternative Form/Sequence
- Definition:Euler Numbers/Sequence
- Euler Phi Function/Examples
- Euler Phi Function/Table
- Euler's Number as Sum of Egyptian Fractions
- Euler's Number to Power of its Negative
- Euler's Number to Power of its Reciprocal
- Euler's Number to Power of Itself
- Definition:Euler's Number/Decimal Expansion
- Definition:Euler-Gompertz Constant/Decimal Expansion
- Definition:Euler-Mascheroni Constant/Decimal Expansion
- Definition:Even Integer/Even-Times Even
- Definition:Even Integer/Sequence
- Even Integers not Expressible as Sum of 3, 5 or 7 with Prime
- Even Integers not Sum of 2 Twin Primes
F
- Factorial/Examples
- Factorions Base 10
- Definition:Feigenbaum Constants/First
- Definition:Feigenbaum Constants/Second
- Definition:Fermat Number/Sequence
- Definition:Fermat Prime/Sequence
- Definition:Fermat Pseudoprime/Base 3/Sequence
- Definition:Fermat Pseudoprime/Base 4/Sequence
- Definition:Fermat Pseudoprime/Base 5/Sequence
- Definition:Fibonacci Number/Sequence
- Definition:Fibonacci Number/Sequence/Negative
- Definition:Fibonacci Prime Pair/Examples
- Definition:Fibonacci Prime/Sequence
- Definition:Fibonomial Triangle
- Definition:Fifth Power
- Fifth Root/Examples/2
- Fifth Root/Examples/3
- Definition:First Lemniscate Constant
- Five Ramanujan-Nagell Numbers
- Definition:Foiaș Constant/First/Decimal Expansion
- Definition:Foiaș Constant/Second/Decimal Expansion
- Definition:Fourth Power
- Fourth Powers which are Sum of 4 Fourth Powers
- Definition:Friedman Number
- Full Angle measures 2 Pi Radians
G
- Gamma Function of One Half
- Gamma Function/Examples/One Quarter
- Gamma Function/Examples/One Third
- Definition:Gelfond's Constant
- Definition:Gelfond-Schneider Constant
- Definition:Generalized Pentagonal Number/Sequence
- Generator for Almost Isosceles Pythagorean Triangle/Sequence
- Definition:Giuga Number/Sequence
- Definition:Golden Mean/Decimal Expansion
- Definition:Göbel's Sequence/General/Examples/3
H
- Definition:Happy Number/Sequence
- Definition:Hardy-Ramanujan Number/Sequence
- Definition:Harshad Number/Sequence
- Definition:Hat-Check Triangle
- Definition:Heptagonal Number/Sequence
- Definition:Heptagonal Pyramidal Number/Sequence
- Definition:Hexagonal Number/Sequence
- Definition:Hexagonal Pyramidal Number/Sequence
- Definition:Hexamorphic Number/Sequence
- Definition:Highly Abundant Number/Examples
- Definition:Highly Abundant Number/Sequence
- Definition:Highly Composite Number/Sequence
- Hilbert-Waring Theorem/Sequence
I
- Imaginary Unit to Power of Itself
- Definition:Inconsummate Number
- Integer as Sum of Three Squares/Sequence
- Integer both Square and Triangular/Examples
- Integer Partition/Table
- Integers Differing by 2 with Same Sigma
- Integers for which Sigma of Phi equals Sigma
- Integers not Sum of Distinct Triangular Numbers
- Integers such that all Coprime and Less are Prime
- Integers such that Difference with Power of 2 is always Prime
- Integers which are Sigma for 3 Integers
- Integers whose Number of Representations as Sum of Two Primes is Maximum
- Integers whose Phi times Tau equal Sigma
- Integers whose Ratio between Sigma and Phi is Square
- Integers whose Sigma equals Half Phi times Tau/Historical Note
- Integers whose Sigma equals Half Phi times Tau/Mistake
- Integers whose Sigma Value is Cube
- Integers whose Squares end in 444
- Integers whose Tau value equals Cube Root
- Integers with Prime Values of Sigma Function
- Integers with Prime Values of Sigma Function/Mistake
- Is Pi to the power of Euler's Number Rational?
K
- Definition:Kakeya's Constant
- Definition:Kaprekar Number/Sequence
- Definition:Kaprekar Triple/Sequence
- Definition:Kaprekar Triple/Sequence/Mistake
- Keith Number/Examples/14
- Keith Number/Examples/19
- Keith Number/Examples/197
- Definition:Keith Number/Sequence
- Kepler's Conjecture
- Kepler's Conjecture/Mistake