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A017235
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a(n) = (9*n + 6)^3.
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1
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216, 3375, 13824, 35937, 74088, 132651, 216000, 328509, 474552, 658503, 884736, 1157625, 1481544, 1860867, 2299968, 2803221, 3375000, 4019679, 4741632, 5545233, 6434856, 7414875, 8489664
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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.: 27*(8 + 93*x + 60*x^2 + x^3)/(x-1)^4. - R. J. Mathar, Mar 20 2018
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MATHEMATICA
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(9*Range[0, 30]+6)^3 (* or *) LinearRecurrence[{4, -6, 4, -1}, {216, 3375, 13824, 35937}, 30] (* Harvey P. Dale, Feb 14 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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