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A047857
a(n) = T(0,n) + T(1,n-1) + ... + T(n,0), array T given by A047848.
0
1, 3, 8, 23, 73, 251, 920, 3573, 14695, 64047, 295792, 1445659, 7460349, 40539363, 231303192, 1381924345, 8623569739, 56078184471, 379232618512, 2662012084719, 19362915524849, 145719545817995, 1133022996552664
OFFSET
0,2
MATHEMATICA
Table[Sum[((k + 3)^(n - k) + k + 1)/(k + 2), {k, 0, n}], {n, 0, 25}] (* Vaclav Kotesovec, May 23 2021 *)
CROSSREFS
Sequence in context: A230952 A148777 A124462 * A101495 A134758 A050511
KEYWORD
nonn
EXTENSIONS
a(14) onward corrected by Sean A. Irvine, May 22 2021
STATUS
approved