OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..300
FORMULA
E.g.f.: 6*x/(1-x).
a(n) = n*a(n-1) = 6*A000142(n) for n>0.
MATHEMATICA
Join[{0}, 6 Range[25]!]
PROG
(Magma) [n eq 0 select 0 else 6*Factorial(n): n in [0..25]];
(GAP) Concatenation([0], List([1..25], n -> 6*Factorial(n))); # Bruno Berselli, Feb 13 2018
(PARI) a(n) = if (n, 6*n!, 0); \\ Michel Marcus, Feb 15 2018
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Feb 13 2018
EXTENSIONS
Edited by Bruno Berselli, Feb 13 2018
STATUS
approved