A058132 - OEIS

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A058132

Number of self-converse monoids (semigroups with identity) of order n.

1, 2, 5, 19, 84, 509, 3901, 48957 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`Index entries for sequences related to monoids`
	CROSSREFS	`a(n)=A058133(n)2-A058129(n).` `Sequence in context: A181513 A179566 A107377 A002851 A124348 A205804` `Adjacent sequences: A058129 A058130 A058131 * A058133 A058134 A058135`
	KEYWORD	`nonn,more`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Nov 13 2000`
	EXTENSIONS	`a(8) from Max Alekseyev (maxale(AT)gmail.com), Jul 13 2009`

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Last modified February 14 11:36 EST 2012. Contains 205623 sequences.