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A130859 1729-gonal numbers. 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
a(n) = (1727n^2 - 1725n)/2.
MATHEMATICA
PolygonalNumber[1729, Range[40]] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Sep 15 2016 *)
PROG
(PARI) a(n) = (1727*n^2 - 1725*n)/2 \\ Michel Marcus, Jul 16 2013
CROSSREFS
Cf. A130876.
Sequence in context: A018850 A062924 A350270 * A245671 A154716 A154728
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Oct 06 2007, based on a suggestion from Anton Mravcek in 2004.
STATUS
approved

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)