A066305 - OEIS

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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; text; internal format)

OFFSET

1,3

LINKS

Table of n, a(n) for n=1..6.

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 A329260 A111542

Adjacent sequences: A066302 A066303 A066304 * A066306 A066307 A066308

KEYWORD

nonn,more

AUTHOR

Christian G. Bower, Dec 12 2001

STATUS

approved