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0, 0, 32, 384, 3072, 20480, 122880, 688128, 3670016, 18874368, 94371840, 461373440, 2214592512, 10468982784, 48855252992, 225485783040, 1030792151040, 4672924418048, 21028159881216, 94008244174848, 417814418554880
(list;
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history;
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OFFSET
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0,3
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Index to sequences with linear recurrences with constant coefficients, signature (12,-48,64).
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FORMULA
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G.f.: 32*x^2/(1 - 4*x)^3. - Vincenzo Librandi, Feb 10 2013
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MATHEMATICA
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CoefficientList[Series[32 x^2/(1 - 4 x)^3, {x, 0, 30}], x] (* Vincenzo Librandi, Feb 10 2013 *)
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PROG
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(MAGMA) [(n^2-n)*4^n: n in [0..20]]; // Vincenzo Librandi, Feb 10 2013
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CROSSREFS
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Cf. A036289, A007758.
Sequence in context: A125420 A163690 A087024 * A086942 A068548 A195191
Adjacent sequences: A128795 A128796 A128797 * A128799 A128800 A128801
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KEYWORD
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nonn
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AUTHOR
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Mohammad K. Azarian, Apr 07 2007
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STATUS
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approved
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