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A250101
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Expansion of (18*x+86*x^2)/(1-11*x^2-150*x^3).
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1
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0, 18, 86, 198, 3646, 15078, 69806, 712758, 3029566, 18311238, 140238926, 655858518, 4289313886, 28250282598, 145561230446, 954150191478, 5838715924606, 32329836673158, 207348403892366, 1231435592095638, 7130307943789726, 44648052096906918, 263148726196032686
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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) = 2^(1+n)*3^n - (-3-4*i)^n - (-3+4*i)^n where i is the imaginary unit.
a(n) = 11*a(n-2) + 150*a(n-3) for n>2.
(End)
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PROG
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(PARI) concat(0, Vec((18*x+86*x^2)/(1-11*x^2-150*x^3) + O(x^30))) \\ Michel Marcus, Aug 28 2015
(PARI) a(n) = 2^(1+n)*3^n - (-3-4*I)^n - (-3+4*I)^n \\ Colin Barker, Apr 14 2016
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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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