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A117591
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2^n + Fibonacci(n).
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4
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| a(3n) is even if n>0. - Robert G. Wilson v, Sep 06 2002
3 divides a(8n+1) and a(8n-1) - Enrique Pérez Herrero, Dec 29 2010
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FORMULA
| G.f. (1-3x^2)/(1-x-x^2)/(1-2x).
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MATHEMATICA
| Table[f=Fibonacci[n]; 2^n+f, {n, 1, 40, 1}] (Vladimir Orlovsky, Jul 23 2008)
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CROSSREFS
| Cf. A000045, A000079, A074824.
Sequence in context: A158943 A133999 A014610 * A003055 A018101 A158568
Adjacent sequences: A117588 A117589 A117590 * A117592 A117593 A117594
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KEYWORD
| easy,nonn
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AUTHOR
| Frank Adams-Watters (FrankTAW(AT)Netscape.net), Apr 04 2006
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