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A133983 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 A153699

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 13 23:45 EST 2009. Contains 170824 sequences.

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