A268215 Coefficients of e.g.f. for numbers of graded interval orders.

1, 1, 3, 13, 99, 1021, 13443

Offset

0,3

Links

Table of n, a(n) for n=0..6.

Yan X Zhang, Four Variations on Graded Posets, arXiv preprint arXiv:1508.00318 [math.CO], 2015. See Fig. 8.

Crossrefs

Sequence in context: A306082 A220897 A267196 * A323687 A338697 A168417

Adjacent sequences: A268212 A268213 A268214 * A268216 A268217 A268218

Keyword

nonn,more

Author

N. J. A. Sloane, Jan 28 2016

Status

approved