A058115 Number of asymmetric idempotent semigroups of order n.
1, 1, 1, 3, 12, 68, 502, 4158
Offset: 0
Crossrefs
Main diagonal of A058113.
Extensions
Updated Feb 19 2001
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.