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%I #7 Jan 29 2016 05:19:46
%S 1,1,3,13,99,1021,13443
%N Coefficients of e.g.f. for numbers of graded interval orders.
%H Yan X Zhang, <a href="http://arxiv.org/abs/1508.00318">Four Variations on Graded Posets</a>, arXiv preprint arXiv:1508.00318 [math.CO], 2015. See Fig. 8.
%K nonn,more
%O 0,3
%A _N. J. A. Sloane_, Jan 28 2016