id:A133983 - OEIS Search Results

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Number of nonisomorphic n-element self-dual posets.

+0
2

1, 2, 3, 8, 15, 50, 119, 493 (list; graph; listen)

	OFFSET	`1,2`
	CROSSREFS	`Sequence in context: A006882 A080498 A148013 this_sequence A005162 A129108 A100321` `Adjacent sequences: A133980 A133981 A133982 this_sequence A133984 A133985 A133986`
	KEYWORD	`nonn`
	AUTHOR	`R. P. Stanley (rstan(AT)math.mit.edu), Jan 08 2008`

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Last modified December 4 21:35 EST 2008. Contains 151309 sequences.