A058110 - OEIS

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A058110

Semigroups of order n with 2 idempotents.

3, 9, 50, 309, 2806, 58583 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`2,1`
	LINKS	`Table of n, a(n) for n=2..7.` `Index entries for sequences related to semigroups`
	CROSSREFS	`Column 2 of A058108.` `Sequence in context: A190009 A012063 A036751 * A171951 A106329 A193521` `Adjacent sequences: A058107 A058108 A058109 * A058111 A058112 A058113`
	KEYWORD	`nonn,hard`
	AUTHOR	`Christian G. Bower, Nov 09 2000`
	EXTENSIONS	`Updated Feb 19 2001`
	STATUS	`approved`

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Last modified May 24 00:43 EDT 2013. Contains 225613 sequences.