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A185292
Expansion of (x*(1+x)/(1-x^3))^4
5
0, 0, 0, 0, 1, 4, 6, 8, 17, 24, 26, 44, 60, 60, 90, 120, 115, 160, 210, 196, 259, 336, 308, 392, 504, 456, 564, 720, 645, 780, 990, 880, 1045, 1320, 1166, 1364, 1716, 1508, 1742, 2184, 1911, 2184, 2730, 2380, 2695
OFFSET
0,6
COMMENTS
Expansion of ((x+x^2)/(1-x^3))^k for k = 4 ; for k=1 see A011655, for k = 2 see A186731, for k = 3 see A185395.
Column k = 4 of triangle in A198295.
LINKS
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