A085646 Sum of the entries in the character table of the group GL(2,Z_n).
1, 5, 24, 52, 120, 120, 336, 496, 654, 600, 1320, 1248, 2184, 1680, 2880
Offset: 1
Formula
For an odd prime p : a(p) = p*(p^2-1).
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.