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A268215 Coefficients of e.g.f. for numbers of graded interval orders. 0
1, 1, 3, 13, 99, 1021, 13443 (list; graph; refs; listen; history; text; internal format)
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 A168417 A240167

Adjacent sequences:  A268212 A268213 A268214 * A268216 A268217 A268218

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jan 28 2016

STATUS

approved

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Last modified November 22 16:25 EST 2019. Contains 329396 sequences. (Running on oeis4.)