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A128967 (n^3-n)*8^n. 1
0, 384, 12288, 245760, 3932160, 55050240, 704643072, 8455716864, 96636764160, 1063004405760, 11338713661440, 117922622078976, 1200666697531392, 12006666975313920, 118219490218475520, 1148417904979476480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Index entries for linear recurrences with constant coefficients, signature (32,-384,2048,-4096).

FORMULA

G.f.: 384x^2/(1-8x)^4. a(n)=384*A140802(n-2). [R. J. Mathar, Dec 19 2008]

a(n) = 32*a(n-1) - 384*a(n-2) + 2048*a(n-3) - 4096*a(n-4). - Vincenzo Librandi, Feb 11 2013

MATHEMATICA

LinearRecurrence[{32, -384, 2048, -4096}, {0, 384, 12288, 245760}, 30] (* Vincenzo Librandi, Feb 11 2013 *)

PROG

(MAGMA)[(n^3 - n)*8^n: n in [1..25]]; // Vincenzo Librandi, Feb 11 2013

CROSSREFS

Cf. A128796, A036289, A140802.

Sequence in context: A203980 A061403 A281656 * A168675 A190401 A256727

Adjacent sequences:  A128964 A128965 A128966 * A128968 A128969 A128970

KEYWORD

nonn,easy

AUTHOR

Mohammad K. Azarian, Apr 28 2007

EXTENSIONS

Corrected the offset. - Mohammad K. Azarian, Nov 20 2008

STATUS

approved

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Last modified October 30 12:22 EDT 2020. Contains 338079 sequences. (Running on oeis4.)