login

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”).

A374653
a(n) = Sum_{k=1..n+1} (k + 1)(n - k + 1)!.
1
5, 11, 27, 85, 359, 1953, 12907, 99461, 871455, 8538169, 92409683, 1094367597, 14071365511, 195177925025, 2904454929339, 46151637341653, 779850886057967, 13962610118134281, 264033196462146595, 5258262698750606909, 110001474536281307223
OFFSET
1,1
MATHEMATICA
t[n_] := Sum[ (k + 1)*(n - k + 1)!, {k, 1, n + 1}]
Table[t[n], {n, 1, 30}]
CROSSREFS
Cf. A374652.
Sequence in context: A119503 A048655 A181896 * A041671 A215221 A203160
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jul 25 2024
STATUS
approved