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A100855
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a(n) = n*(n^3-n^2+n+1)/2.
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2
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0, 1, 7, 33, 106, 265, 561, 1057, 1828, 2961, 4555, 6721, 9582, 13273, 17941, 23745, 30856, 39457, 49743, 61921, 76210, 92841, 112057, 134113, 159276, 187825, 220051, 256257, 296758, 341881, 391965, 447361, 508432, 575553, 649111, 729505, 817146, 912457
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OFFSET
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0,3
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REFERENCES
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T. A. Gulliver, Sequences from Cubes of Integers, Int. Math. Journal, 4 (2003), 439-445.
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LINKS
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FORMULA
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G.f. x*(1+2*x+8*x^2+x^3) / (1-x)^5 . - R. J. Mathar, Jun 15 2011
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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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