A003425 - OEIS

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A003425

n! times number of posets with n elements.
(Formerly M4294)

1, 1, 6, 114, 5256, 507720, 93616560, 30894489360, 17407086641280, 16152167106391680, 23990233574783750400, 55735096448700749203200 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	REFERENCES	`K. K.-H. Butler, A Moore-Penrose inverse for Boolean relation matrices, pp. 18-28 of Combinatorial Mathematics (Proceedings 2nd Australian Conf.), Lect. Notes Math. 403, 1974.` `N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).`
	LINKS	`Index entries for sequences related to posets`
	CROSSREFS	`Cf. A001035.` `Sequence in context: A194476 A059116 A121544 * A052465 A113015 A024275` `Adjacent sequences: A003422 A003423 A003424 * A003426 A003427 A003428`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 21:17 EST 2012. Contains 205971 sequences.