OFFSET
0,6
COMMENTS
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..1000
FORMULA
G.f.: (x*(1+x)/(1-x^3))^4.
MATHEMATICA
CoefficientList[Series[(x*(1 + x)/(1 - x^3))^4, {x, 0, 50}], x] (* G. C. Greubel, Jun 25 2017 *)
PROG
(PARI) x='x+O('x^50); concat([0, 0, 0, 0], Vec((x*(1+x)/(1-x^3))^4)) \\ G. C. Greubel, Jun 25 2017
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Philippe Deléham, Jan 25 2012
STATUS
approved