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A033578 a(n) = (3*n - 1)*(4*n - 1). 1
1, 6, 35, 88, 165, 266, 391, 540, 713, 910, 1131, 1376, 1645, 1938, 2255, 2596, 2961, 3350, 3763, 4200, 4661, 5146, 5655, 6188, 6745, 7326, 7931, 8560, 9213, 9890, 10591, 11316, 12065, 12838, 13635, 14456, 15301, 16170, 17063, 17980, 18921, 19886, 20875 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 0..5000

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

MAPLE

seq((3*n-1)*(4*n-1), n=0..42); # Nathaniel Johnston, Jun 26 2011

MATHEMATICA

Table[(3*n - 1)*(4*n - 1), {n, 0, 60}] (* Vladimir Joseph Stephan Orlovsky, Jun 26 2011 *)

PROG

(PARI) a(n)=(3*n-1)*(4*n-1) \\ Charles R Greathouse IV, Jun 17 2017

CROSSREFS

Sequence in context: A046025 A198327 A009583 * A101077 A094952 A024526

Adjacent sequences:  A033575 A033576 A033577 * A033579 A033580 A033581

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane

STATUS

approved

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Last modified October 16 05:44 EDT 2018. Contains 316259 sequences. (Running on oeis4.)