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A017202
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a(n) = (9*n + 3)^6.
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1
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729, 2985984, 85766121, 729000000, 3518743761, 12230590464, 34296447249, 82653950016, 177978515625, 351298031616, 646990183449, 1126162419264, 1870414552161, 2985984000000, 4608273662721
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OFFSET
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0,1
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LINKS
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FORMULA
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G.f.: -729*(1 + 4089*x + 88998*x^2 + 262438*x^3 + 154113*x^4 + 15177*x^5 + 64*x^6)/(x-1)^7. - R. J. Mathar, Jul 14 2016
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MATHEMATICA
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(9*Range[0, 30]+3)^6 (* or *) LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {729, 2985984, 85766121, 729000000, 3518743761, 12230590464, 34296447249}, 30] (* Harvey P. Dale, Nov 24 2018 *)
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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