Palindromic Triangular Numbers/Historical Note
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Historical Note on Palindromic Triangular Numbers
David Wells reports in Curious and Interesting Numbers of $1986$ that examples of the palindromic triangular numbers were examined by Charles Wilderman Trigg.
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $15$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $15$