OFFSET
0,2
FORMULA
a(n)=(3n^2+3n+1)n!=((n+1)^3-n^3)n!=n!A003215(n). - Paul Barry, Apr 02 2003
E.g.f.: (1 + 4*x + x^2)/(1 - x)^3. - Ilya Gutkovskiy, May 12 2017
MATHEMATICA
Table[(3n(n+1)+1)n!, {n, 0, 18}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Aug 05 2000
EXTENSIONS
More terms from Wouter Meeussen, Aug 05 2000
STATUS
approved