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A368561
a(n) = Sum_{k=0..n} k! * n^k.
2
1, 2, 11, 184, 6565, 390806, 34557919, 4237440628, 687219772553, 142347286888210, 36654963132246211, 11483715014356017104, 4300711472638444724653, 1897241450053063830832078, 973695564434830963964311655
OFFSET
0,2
FORMULA
a(n) ~ n! * n^n. - Vaclav Kotesovec, Jan 13 2024
PROG
(PARI) a(n) = sum(k=0, n, k!*n^k);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Dec 30 2023
STATUS
approved