A262291 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A262291

a(n) = Sum_k k!*A262292(n,k).

%I #17 Jul 15 2024 16:31:43

%S 0,2,24,330,5382,98250

%N a(n) = Sum_k k!*A262292(n,k).

%H P. J. Cameron, M. Gadouleau, J. D. Mitchell, and 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

%E Missing term a(3) added by _Pontus von Brömssen_, Jul 08 2024