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A168616
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a(n) = 2^n - 5.
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8
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-4, -3, -1, 3, 11, 27, 59, 123, 251, 507, 1019, 2043, 4091, 8187, 16379, 32763, 65531, 131067, 262139, 524283, 1048571, 2097147, 4194299, 8388603, 16777211, 33554427, 67108859, 134217723, 268435451, 536870907, 1073741819, 2147483643
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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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a(n) = 2*a(n-1) + 5.
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MATHEMATICA
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CoefficientList[Series[(9 x - 4)/((x - 1) (2 x - 1)), {x, 0, 60}], x] (* Vincenzo Librandi, Sep 19 2013 *)
LinearRecurrence[{3, -2}, {-4, -3}, 40] (* Harvey P. Dale, Oct 15 2014 *)
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PROG
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CROSSREFS
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KEYWORD
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sign,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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