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A130859
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1729-gonal numbers.
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2
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1, 1729, 5184, 10366, 17275, 25911, 36274, 48364, 62181, 77725, 94996, 113994, 134719, 157171, 181350, 207256, 234889, 264249, 295336, 328150, 362691, 398959, 436954, 476676, 518125, 561301, 606204, 652834, 701191, 751275, 803086, 856624, 911889, 968881, 1027600, 1088046, 1150219
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OFFSET
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1,2
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LINKS
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FORMULA
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a(n) = (1727n^2 - 1725n)/2.
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MATHEMATICA
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PolygonalNumber[1729, Range[40]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Sep 15 2016 *)
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PROG
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(PARI) a(n) = (1727*n^2 - 1725*n)/2 \\ Michel Marcus, Jul 16 2013
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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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N. J. A. Sloane, Oct 06 2007, based on a suggestion from Anton Mravcek in 2004.
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STATUS
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approved
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