A058122 - OEIS

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A058122

Number of self-converse idempotent semigroups of order n.

1, 1, 1, 2, 6, 19, 68, 285 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	LINKS	`Index entries for sequences related to semigroups`
	CROSSREFS	`Main diagonal of A058118.` `Sequence in context: A150103 A150104 A145868 * A150105 A150106 A150107` `Adjacent sequences: A058119 A058120 A058121 * A058123 A058124 A058125`
	KEYWORD	`nonn,hard`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), Nov 10 2000`

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Last modified February 15 08:37 EST 2012. Contains 205729 sequences.