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A080423
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(n+1)(n+2)(n+3)(n+4)(n+15)3^n/360.
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3
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1, 16, 153, 1134, 7182, 40824, 214326, 1058508, 4979799, 22517352, 98513415, 419129802, 1741000716, 7083045648, 28296044604, 111232727064, 431026817373, 1648861601184, 6234757929477, 23328137324646, 86451332438394
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OFFSET
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0,2
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (18,-135,540,-1215,1458,-729).
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FORMULA
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G.f. (1-2x)/(1-3x)^6
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MATHEMATICA
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CoefficientList[Series[(1 - 2 x) / (1 - 3 x)^6, {x, 0, 30}], x] (* Vincenzo Librandi, Aug 05 2013 *)
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PROG
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(MAGMA) [Floor((n+1)*(n+2)*(n+3)*(n+4)*(n+15)*3^n/360): n in [0..30]]; // Vincenzo Librandi, Aug 05 2013
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CROSSREFS
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T(n, 5) of triangle A080419.
Sequence in context: A224737 A076071 A096136 * A004313 A249981 A144499
Adjacent sequences: A080420 A080421 A080422 * A080424 A080425 A080426
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry, Feb 19 2003
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STATUS
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approved
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