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2, 24, 98, 504, 3074, 19992, 133346, 901752, 6155522, 42306840, 292240994, 2026155000, 14085427970, 98109713688, 684326588642, 4778079088248, 33385518460418, 233393453440536, 1632228295176290, 11417968671701496
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OFFSET
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0,1
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LINKS
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FORMULA
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G.f.: 2*(1-2*x-59*x^2+204*x^3)/((1-x)^2*(1-7*x)*(1-5*x)). - Vincenzo Librandi, Feb 23 2013
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MATHEMATICA
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CoefficientList[Series[2 (1 - 2 x - 59 x^2 + 204 x^3)/((1-x)^2 (1-7 x) (1-5 x)), {x, 0, 20}], x] (* Vincenzo Librandi, Feb 23 2013 *)
LinearRecurrence[{14, -60, 82, -35}, {2, 24, 98, 504}, 20] (* Harvey P. Dale, Aug 15 2013 *)
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PROG
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(PARI) for(n=0, 20, print1(12*n+7^n+5^n", ")); \\ Bruno Berselli, Feb 27 2013
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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