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A085352
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Expansion of (1-4x)/((1-5x)(1-6x)).
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3
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1, 7, 47, 307, 1967, 12427, 77687, 481747, 2968607, 18202267, 111166727, 676765987, 4109424047, 24900684907, 150624812567, 909852391027, 5489631924287, 33090379436347, 199305216071207, 1199645993692867
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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a(n) = 2*6^n - 5^n.
a(n) = 11*a(n-1) - 30*a(n-2) for n>1. - Colin Barker, Jul 07 2020
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PROG
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(PARI) Vec((1 - 4*x) / ((1 - 5*x)*(1 - 6*x)) + O(x^20)) \\ Colin Barker, Jul 07 2020
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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