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 A162679 G.f. is the polynomial (Product_{k=1..22} (1 - x^(3*k)))/(1-x)^22. 1
 1, 22, 253, 2023, 12628, 65527, 293985, 1171368, 4226112, 14009116, 43155475, 124666555, 340214160, 882447555, 2186642775, 5198778091, 11903438767, 26332159753, 56436426134, 117478662620, 238027900220, 470331123901 (list; graph; refs; listen; history; text; internal format)
 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..737 MAPLE m:=22: seq(coeff(series(mul((1-x^(3*k)), k=1..m)/(1-x)^m, x, n+1), x, n), n=0..21); # Muniru A Asiru, Jul 07 2018 MATHEMATICA With[{num=Times@@(1-x^Range[3, 66, 3])}, CoefficientList[Series[num/(1-x)^22, {x, 0, 40}], x]] (* Harvey P. Dale, Dec 31 2012 *) PROG (PARI) x='x+O('x^50); A = prod(k=1, 22, (1-x^(3*k)))/(1-x)^22; Vec(A) \\ G. C. Greubel, Jul 0762018 (Magma) m:=50; R:=PowerSeriesRing(Integers(), m); F:=(&*[(1-x^(3*k)): k in [1..22]])/(1-x)^22; Coefficients(R!(F)); // G. C. Greubel, Jul 06 2018 CROSSREFS Sequence in context: A161900 A162364 A028571 * A325742 A010974 A022587 Adjacent sequences: A162676 A162677 A162678 * A162680 A162681 A162682 KEYWORD nonn AUTHOR N. J. A. Sloane, Dec 02 2009 STATUS approved

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Last modified February 24 05:49 EST 2024. Contains 370293 sequences. (Running on oeis4.)