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A117591
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a(n) = 2^n + Fibonacci(n).
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8
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1, 3, 5, 10, 19, 37, 72, 141, 277, 546, 1079, 2137, 4240, 8425, 16761, 33378, 66523, 132669, 264728, 528469, 1055341, 2108098, 4212015, 8417265, 16823584, 33629457, 67230257, 134414146, 268753267, 537385141, 1074573864, 2148829917
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listen;
history;
text;
internal format)
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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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G.f. (1-3*x^2)/((1-x-x^2)*(1-2*x)).
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MATHEMATICA
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CoefficientList[Series[(1-3x^2)/((1-x-x^2)(1-2x)), {x, 0, 35}], x] (* Vincenzo Librandi, Nov 02 2014 *)
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PROG
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(Haskell)
a117591 n = a117591_list !! n
a117591_list = zipWith (+) a000079_list a000045_list
(Sage) [2^n +fibonacci(n) for n in (0..40)] # G. C. Greubel, Jul 05 2021
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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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