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A268215
Coefficients of e.g.f. for numbers of graded interval orders.
0
1, 1, 3, 13, 99, 1021, 13443
OFFSET
0,3
LINKS
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
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jan 28 2016
STATUS
approved