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 A047927 a(n) = n*(n-1)*(n-2)^2. 7
 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 From R. J. Mathar, May 01 2014: (Start) G.f.: -6*x^3*(1+3*x) / (x-1)^5. a(n) = 6*A002417(n-2). (End) 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: A335384 A331668 A005353 * A059238 A254832 A026695 Adjacent sequences:  A047924 A047925 A047926 * A047928 A047929 A047930 KEYWORD nonn,easy AUTHOR EXTENSIONS Offset changed from 0 to 2 by Vincenzo Librandi, May 02 2011 STATUS approved

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Last modified August 17 08:02 EDT 2022. Contains 356184 sequences. (Running on oeis4.)