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A066305 Number of connected reduced partially ordered sets (posets) with n unlabeled elements. 1
1, 0, 2, 5, 22, 117 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

LINKS

N. J. A. Sloane, Transforms

Index entries for sequences related to posets

CROSSREFS

Cf. A000608. Inverse Euler transform of A066304.

Sequence in context: A115602 A115601 A015557 * A020093 A111542 A001437

Adjacent sequences:  A066302 A066303 A066304 * A066306 A066307 A066308

KEYWORD

nonn,more

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Dec 12 2001

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.