OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..300
FORMULA
a(n) = 11^n*n!.
E.g.f.: 1/(1-11*x).
From Amiram Eldar, Jun 25 2020: (Start)
Sum_{n>=0} 1/a(n) = e^(1/11).
Sum_{n>=0} (-1)^n/a(n) = e^(-1/11). (End)
MATHEMATICA
Table[11^n n!, {n, 0, 20}] (* Harvey P. Dale, Sep 21 2015 *)
PROG
(Magma) [(Factorial(n)*11^n): n in [0..20]]; // Vincenzo Librandi, Oct 28 2011
(PARI) a(n)=11^n*n! \\ Charles R Greathouse IV, Nov 22 2011
CROSSREFS
KEYWORD
nonn,easy,less
AUTHOR
Philippe Deléham, Oct 27 2011
STATUS
approved