A076715 Duplicate of A029549.
0, 6, 210, 7140, 242556, 8239770, 279909630, 9508687656, 323015470680
Offset: 1
Keywords
Formula
a(n) = Binomial(A046090(n), 2). - Mitch Harris, Apr 19 2007
This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.