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A262291
a(n) = Sum_k k!*A262292(n,k).
1
0, 2, 24, 330, 5382, 98250
OFFSET
2,2
LINKS
P. J. Cameron, M. Gadouleau, J. D. Mitchell, and Y. Peresse, Chains of subsemigroups, arXiv preprint arXiv:1501.06394 [math.GR], 2015. See Table 1.
CROSSREFS
Cf. A262292.
Sequence in context: A209290 A333715 A081065 * A043699 A220317 A220340
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Sep 21 2015
EXTENSIONS
Missing term a(3) added by Pontus von Brömssen, Jul 08 2024
STATUS
approved