OFFSET
0,2
LINKS
Robert Israel, Table of n, a(n) for n = 0..450
FORMULA
E.g.f.: (x+1)^(2*x+2).
From Robert Israel, Dec 23 2015: (Start)
a(n+1) = 2*(a(n) + Sum_{k=0..n-1} (-1)^(n-1-k)*n!*a(k)/((n-k)*k!). (End)
MAPLE
S:= series((x+1)^(2*x+2), x, 51):
seq(coeff(S, x, j)*j!, j=0..50); # Robert Israel, Dec 23 2015
MATHEMATICA
With[{nn=30}, CoefficientList[Series[(x+1)^(2x+2), {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, May 20 2018 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Ben Paul Thurston, Dec 23 2015
EXTENSIONS
More terms from Alois P. Heinz, Dec 23 2015
STATUS
approved