A066305 Number of connected reduced partially ordered sets (posets) with n unlabeled elements.

1, 0, 2, 5, 22, 117

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