OFFSET
0,3
COMMENTS
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..386
FORMULA
MAPLE
b:= proc(n, m) option remember; `if`(n=0, m, add((j-1)!*
b(n-j, min(m, j))*binomial(n-1, j-1), j=1..n))
end:
a:= n-> add(b(j$2)*n^(n-j)*binomial(n-1, j-1), j=0..n):
seq(a(n), n=0..25); # Alois P. Heinz, May 20 2016
MATHEMATICA
nn=20; t=Sum[n^(n-1)x^n/n!, {n, 1, nn}]; Apply[Plus, Table[Range[0, nn]!CoefficientList[Series[Exp[Sum[t^i/i, {i, n, nn}]]-1, {x, 0, nn}], x], {n, 1, nn}]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Geoffrey Critzer, Jan 10 2013
STATUS
approved