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A048499
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a(n) = 2^(n-1)*(6*n-10)+6.
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1
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1, 2, 10, 38, 118, 326, 838, 2054, 4870, 11270, 25606, 57350, 126982, 278534, 606214, 1310726, 2818054, 6029318, 12845062, 27262982, 57671686, 121634822, 255852550, 536870918, 1124073478, 2348810246, 4898947078, 10200547334, 21206401030, 44023414790
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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) = T(5, n), array T given by A048494.
G.f.: (1-3*x+8*x^2) / ((1-x)*(1-2*x)^2). - Colin Barker, Aug 24 2016
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PROG
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(PARI) Vec((1-3*x+8*x^2)/((1-x)*(1-2*x)^2) + O(x^40)) \\ Colin Barker, Aug 24 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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EXTENSIONS
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STATUS
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approved
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