User talk:Edwin sockpuppet

Edwin sockpuppet function
Here is a function I thought of myself. A(1) is the first triangular number = 1. A(2) is the second square number = 4. A(3) is the third pentagonal number = 12. A(4) is the fourth hexagonal number = 28. In general, A(n) is the nth (n+2)-gonal number. Edwin sockpuppet (talk) 17:56, August 7, 2019 (UTC)