A058132 Number of self-converse monoids (semigroups with identity) of order n.
0, 1, 2, 5, 19, 84, 509, 3901, 48957
Offset: 0
Extensions
a(8) from Max Alekseyev, Jul 13 2009
a(0) prepended by Jianing Song, Oct 26 2019
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