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A080962
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5th binomial transform of the periodic sequence (1,6,1,1,6,1...).
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4
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1, 11, 86, 596, 3896, 24656, 153056, 938816, 5714816, 34616576, 209010176, 1259303936, 7576795136, 45544656896, 273603485696, 1642963091456, 9863147257856, 59200358383616, 355288049647616, 2132071895269376
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 6*a(n-1)+5*4^(n-1).
a(n) = (7/2)*6^n-(5/2)*4^n.
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MATHEMATICA
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CoefficientList[Series[(1 + x) / ((1 - 4 x) (1 - 6 x)), {x, 0, 30}], x] (* Vincenzo Librandi, Aug 06 2013 *)
LinearRecurrence[{10, -24}, {1, 11}, 20] (* Harvey P. Dale, Sep 06 2016 *)
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PROG
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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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STATUS
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approved
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