Category:Second Pentagonal Numbers
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This category contains results about Second Pentagonal Numbers.
Definitions specific to this category can be found in Definitions/Second Pentagonal Numbers.
The second pentagonal numbers are the integers obtained by applying the Closed Form for Pentagonal Numbers to negative $n$:
- $\map {P'} n = \dfrac {-n \paren {-3 n - 1} } 2$
Subcategories
This category has only the following subcategory.
S
Pages in category "Second Pentagonal Numbers"
The following 2 pages are in this category, out of 2 total.