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A130876 Centered 1729-gonal numbers. 2
1, 1730, 5188, 10375, 17291, 25936, 36310, 48413, 62245, 77806, 95096, 114115, 134863, 157340, 181546, 207481, 235145, 264538, 295660, 328511, 363091, 399400, 437438, 477205, 518701, 561926, 606880, 653563, 701975, 752116, 803986, 857585, 912913 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..32.

Index entries for linear recurrences with constant coefficients, signature (3, -3, 1).

FORMULA

a(n) = 1+(1729/2)*n+(1729/2)*n^2.

MAPLE

a:= n-> 1+(1729/2)*n*(1+n):

seq(a(n), n=0..35);  # Alois P. Heinz, Jul 16 2013

MATHEMATICA

LinearRecurrence[{3, -3, 1}, {1, 1730, 5188}, 40] (* or *) Table[1+(1729/2)n(n+1), {n, 0, 40}] (* Harvey P. Dale, May 22 2017 *)

PROG

(PARI) a(n) = 1 + (1729/2)*n + (1729/2)*n^2 \\ Michel Marcus, Jul 16 2013

CROSSREFS

Cf. A130859.

Sequence in context: A339909 A339878 A258166 * A234706 A211853 A252454

Adjacent sequences:  A130873 A130874 A130875 * A130877 A130878 A130879

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 September 25 18:27 EDT 2022. Contains 356986 sequences. (Running on oeis4.)