OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..26
FORMULA
a(n) equals (row sums of A120666) + 1.
From Vaclav Kotesovec, Feb 08 2019: (Start)
a(n) ~ A034841(n).
a(n) ~ n^(n^2 - n/2 + 1) / (exp(1/12) * (2*Pi)^((n-1)/2)). (End)
MATHEMATICA
Table[Sum[(k*n)!/n!^k, {k, 0, n}], {n, 0, 10}] (* Vaclav Kotesovec, Feb 08 2019 *)
PROG
(PARI) {a(n) = sum(k=0, n, (k*n)!/n!^k)}
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Jan 31 2019
STATUS
approved