OFFSET
0,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 0..1746
Index entries for linear recurrences with constant coefficients, signature (-4,-1).
FORMULA
G.f.: 1/Sum_{k>=0} (k+1)^3*x^k.
From Colin Barker, Dec 19 2017: (Start)
a(n) = -6*sqrt(3)*((-2-sqrt(3))^n*(-2+sqrt(3)) + (-2+sqrt(3))^n*(2+sqrt(3))) for n > 2.
a(n) = -4*a(n-1) - a(n-2) for n > 4.
(End)
PROG
(PARI) N=66; x='x+O('x^N); Vec((1-x)^4/(x^2+4*x+1))
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Seiichi Manyama, Dec 19 2017
STATUS
approved