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A136006
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a(n) = n^6 - n^3.
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1
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0, 0, 56, 702, 4032, 15500, 46440, 117306, 261632, 530712, 999000, 1770230, 2984256, 4824612, 7526792, 11387250, 16773120, 24132656, 34006392, 47039022, 63992000, 85756860, 113369256, 148023722, 191089152, 244125000, 308898200, 387400806, 481868352, 594798932
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OFFSET
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0,3
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LINKS
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FORMULA
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G.f.: (2*x^6 + 58*x^5 + 294*x^4 + 310*x^3 + 56*x^2)/(-x^7 + 7*x^6 - 21*x^5 + 35*x^4 - 35*x^3 + 21*x^2 - 7*x + 1). - Alexander R. Povolotsky, Apr 01 2008
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MAPLE
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MATHEMATICA
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CoefficientList[Series[(2 x^6 + 58 x^5 + 294 x^4 + 310 x^3 + 56 x^2)/(-x^7 + 7 x^6 - 21 x^5 + 35 x^4 - 35 x^3 + 21 x^2 - 7 x + 1), {x, 0, 40}], x] (* Vincenzo Librandi, Feb 16 2014 *)
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PROG
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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