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0, 0, 72, 1296, 15552, 155520, 1399680, 11757312, 94058496, 725594112, 5441955840, 39907676160, 287335268352, 2037468266496, 14262277865472, 98738846760960, 677066377789440, 4604051368968192, 31077346740535296
(list;
graph;
refs;
listen;
history;
text;
internal format)
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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 (18,-108,216).
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FORMULA
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G.f.: 72*x^2/(1 - 6*x)^3. - Vincenzo Librandi, Feb 11 2013
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MATHEMATICA
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CoefficientList[Series[72 x^2/(1 - 6 x)^3, {x, 0, 30}], x] (* Vincenzo Librandi, Feb 11 2013 *)
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PROG
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(MAGMA) [(n^2-n)*6^n: n in [0..25]]; // Vincenzo Librandi, Feb 11 2013
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CROSSREFS
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Cf. A036289, A007758.
Sequence in context: A064567 A168194 A200556 * A008391 A037251 A008659
Adjacent sequences: A128797 A128798 A128799 * A128801 A128802 A128803
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KEYWORD
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nonn,easy
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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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