OFFSET
1,2
FORMULA
a(n) ~ exp(1/exp(1)) * n^(2*n). - Vaclav Kotesovec, Jun 03 2013
MATHEMATICA
Table[Sum[Binomial[n, k]*n^k*k^n, {k, 1, n}], {n, 1, 20}] (* Vaclav Kotesovec, Jun 03 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Karol A. Penson, Jun 07 2002
STATUS
approved