OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (12,-48,64).
FORMULA
From R. J. Mathar, Sep 20 2011: (Start)
G.f.: 4*x*(1 + 4*x)/(1 - 4*x)^3 .
a(n) = 4*A086952(n). (End)
E.g.f.: 4*exp(4*x)*x*(1 + 4*x). - Stefano Spezia, Oct 09 2022
MATHEMATICA
Table[n^2 * 4^n, {n, 0, 30}] (* Vincenzo Librandi, Feb 06 2013 *)
PROG
(Magma) [n^2*4^n: n in [0..20]]; // Vincenzo Librandi, Feb 06 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mohammad K. Azarian, Apr 07 2007
STATUS
approved