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A001534 (9n+1)(9n+8). 1
8, 170, 494, 980, 1628, 2438, 3410, 4544, 5840, 7298, 8918, 10700, 12644, 14750, 17018, 19448, 22040, 24794, 27710, 30788, 34028, 37430, 40994, 44720, 48608, 52658, 56870, 61244, 65780, 70478, 75338, 80360, 85544, 90890, 96398, 102068, 107900, 113894, 120050 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

T. D. Noe, Table of n, a(n) for n = 0..1000

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

FORMULA

a(n) = 162*n + a(n-1) with a(0)=8. - Vincenzo Librandi, Nov 12 2010

a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3) with a(0)=8, a(1)=170, a(2)=494. [Harvey P. Dale, Aug 20 2011]

G.f.: -((2*(x*(4*x+73)+4))/(x-1)^3). [Harvey P. Dale, Aug 20 2011]

MATHEMATICA

f[n_]:=Module[{n9=9n}, (n9+1)(n9+8)]; Array[f, 40, 0] (* or *) LinearRecurrence[ {3, -3, 1}, {8, 170, 494}, 50] (* Harvey P. Dale, Aug 20 2011 *)

PROG

(PARI) a(n)=(9*n+1)*(9*n+8) \\ Charles R Greathouse IV, Jun 17 2017

CROSSREFS

Sequence in context: A181198 A302802 A316816 * A096486 A303463 A300805

Adjacent sequences:  A001531 A001532 A001533 * A001535 A001536 A001537

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified October 13 19:35 EDT 2019. Contains 327981 sequences. (Running on oeis4.)