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A114185 a(n) = Fibonacci(2*n) - n - 1. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

Related to the log base phi of sequence A090162.

LINKS

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.

MAPLE

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

MATHEMATICA

Rest[Table[Fibonacci[2 n] - n - 1, {n, 30}]] (* Vincenzo Librandi, Sep 03 2017 *)

PROG

(MAGMA) [Fibonacci(2*n)-n-1: n in [2..40]]; // Vincenzo Librandi, Sep 03 2017

CROSSREFS

Cf. A001906, A090162.

Sequence in context: A086601 A224147 A227266 * A188516 A188501 A283692

Adjacent sequences:  A114182 A114183 A114184 * A114186 A114187 A114188

KEYWORD

easy,nonn

AUTHOR

Greg Huber, Feb 04 2006

EXTENSIONS

More terms from Vincenzo Librandi, Sep 03 2017

STATUS

approved

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Last modified August 15 13:59 EDT 2022. Contains 356145 sequences. (Running on oeis4.)