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A114185
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a(n) = Fibonacci(2*n) - n - 1.
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1
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0, 4, 16, 49, 137, 369, 978, 2574, 6754, 17699, 46355, 121379, 317796, 832024, 2178292, 5702869, 14930333, 39088149, 102334134, 267914274, 701408710, 1836311879, 4807526951, 12586268999, 32951280072, 86267571244, 225851433688, 591286729849, 1548008755889
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OFFSET
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2,2
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COMMENTS
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Related to the log base phi of sequence A090162.
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 2..1000
Guo-Niu Han, Enumeration of Standard Puzzles, 2011. [Cached copy]
Guo-Niu Han, Enumeration of Standard Puzzles, arXiv:2006.14070 [math.CO], 2020.
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MAPLE
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g:=(-1+3*z)/(1-3*z+z^2): gser:=series(g, z=0, 43): seq(abs(coeff(gser, z, n)-n), n=3..20); # Zerinvary Lajos, Mar 22 2009
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MATHEMATICA
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Rest[Table[Fibonacci[2 n] - n - 1, {n, 30}]] (* Vincenzo Librandi, Sep 03 2017 *)
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PROG
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(MAGMA) [Fibonacci(2*n)-n-1: n in [2..40]]; // Vincenzo Librandi, Sep 03 2017
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CROSSREFS
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Cf. A001906, A090162.
Sequence in context: A086601 A224147 A227266 * A188516 A188501 A283692
Adjacent sequences: A114182 A114183 A114184 * A114186 A114187 A114188
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KEYWORD
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easy,nonn
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AUTHOR
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Greg Huber, Feb 04 2006
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EXTENSIONS
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More terms from Vincenzo Librandi, Sep 03 2017
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STATUS
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approved
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