OFFSET
0,2
COMMENTS
This is a row of the triangle in A162499. Only finitely many terms are nonzero.
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..1365 (terms 0..1000 from Harvey P. Dale)
MATHEMATICA
CoefficientList[Series[Times@@(1-x^Range[3, 90, 3])/(1-x)^30, {x, 0, 20}], x] (* Harvey P. Dale, Oct 04 2011 *)
PROG
(PARI) x='x+O('x^50); A = prod(k=1, 30, (1-x^(3*k)))/(1-x)^30; Vec(A) \\ G. C. Greubel, Jul 07 2018
(Magma) m:=50; R<x>:=PowerSeriesRing(Integers(), m); F:=(&*[(1-x^(3*k)): k in [1..30]])/(1-x)^30; Coefficients(R!(F)); // G. C. Greubel, Jul 07 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 02 2009
STATUS
approved