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A262293
Row sums of triangle A262294.
1
0, 1, 5, 22, 88, 345
OFFSET
2,3
LINKS
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
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Sep 21 2015
EXTENSIONS
New name from Altug Alkan, Jan 05 2016
STATUS
approved