OFFSET
0,2
LINKS
Colin Barker, Table of n, a(n) for n = 0..700
Index entries for linear recurrences with constant coefficients, signature (33,-236,492,-288).
FORMULA
O.g.f.: 1/((1 - x)*(1 - 2*x)(1 - 6*x)*(1 - 24*x)).
From Colin Barker, Feb 02 2018: (Start)
a(n) = (-11 + 115*2^n - 759*6^n + 1920*24^n) / 1265.
a(n) = 33*a(n-1) - 236*a(n-2) + 492*a(n-3) - 288*a(n-4) for n>3. (End)
PROG
(PARI) N=66; x='x+O('x^N); Vec(1/prod(k=1, 4, (1-k!*x)))
(PARI) Vec(1/((1 - x)*(1 - 2*x)*(1 - 6*x)*(1 - 24*x)) + O(x^20)) \\ Colin Barker, Feb 02 2018
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Feb 02 2018
STATUS
approved