A086643 Number of zeros in the character table of the group GL(2,Z_n).
0, 1, 15, 54, 172, 184, 819
Offset: 1
Crossrefs
Cf. A000252.
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.