A030262 Number of nonisomorphic commutative groupoids with no idempotents and a nontrivial symmetry.
0, 0, 0, 3, 96, 54248
Offset: 0
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.