A262293 Row sums of triangle A262294.

0, 1, 5, 22, 88, 345

Offset

2,3

Links

Table of n, a(n) for n=2..7.

P. J. Cameron, M. Gadouleau, J. D. Mitchell, Y. Peresse, Chains of subsemigroups, arXiv preprint arXiv:1501.06394 [math.GR], 2015. See Table 2.

Formula

a(n) = Sum_{k=1..(n-1)} A262294(n,k). - Altug Alkan, Jan 07 2015

Example

a(6) = A262294(6,1) + A262294(6,2) + A262294(6,3) + A262294(6,4) + A262294(6,5) = 0 + 12 + 40 + 30 + 6 = 88. - Altug Alkan, Jan 05 2016

Crossrefs

Cf. A262294.

Sequence in context: A122058 A191008 A006148 * A086090 A037529 A108072

Adjacent sequences: A262290 A262291 A262292 * A262294 A262295 A262296

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 21 2015

Extensions

New name from Altug Alkan, Jan 05 2016

Status

approved