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A047927 n*(n-1)*(n-2)^2. 6
0, 6, 48, 180, 480, 1050, 2016, 3528, 5760, 8910, 13200, 18876, 26208, 35490, 47040, 61200, 78336, 98838, 123120, 151620, 184800, 223146, 267168, 317400, 374400, 438750, 511056, 591948, 682080, 782130, 892800, 1014816, 1148928 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

a(n) = A245334(n,3), n > 2. - Reinhard Zumkeller, Aug 31 2014

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 2..1000

Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1)

FORMULA

G.f.: -6*x^3*(1+3*x) / (x-1)^5 . a(n) = 6*A002417(n-2). - R. J. Mathar, May 01 2014

PROG

(MAGMA) [n*(n-1)*(n-2)^2: n in [2..40]]; // Vincenzo Librandi, May 02 2011

(Haskell)

a047927 n = if n == 2 then 0 else a245334 n 3

-- Reinhard Zumkeller, Aug 31 2014

(PARI) a(n)=n*(n-1)*(n-2)^2 \\ Charles R Greathouse IV, Oct 07 2015

CROSSREFS

Cf. A059238, A245334.

Sequence in context: A167547 A244726 A005353 * A059238 A254832 A026695

Adjacent sequences:  A047924 A047925 A047926 * A047928 A047929 A047930

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Offset changed from 0 to 2 by Vincenzo Librandi, May 02 2011

STATUS

approved

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Last modified February 29 05:25 EST 2020. Contains 332353 sequences. (Running on oeis4.)