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%I #12 Jan 05 2016 11:15:25
%S 0,24,330,5382,98250
%N a(n) = Sum_k k!*A262292(n,k).
%H P. J. Cameron, M. Gadouleau, J. D. Mitchell, Y. Peresse, <a href="http://arxiv.org/abs/1501.06394">Chains of subsemigroups</a>, arXiv preprint arXiv:1501.06394 [math.GR], 2015. See Table 1.
%Y Cf. A262292.
%K nonn,more
%O 2,2
%A _N. J. A. Sloane_, Sep 21 2015
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