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A134498
a(n) = Fibonacci(7n).
10
0, 13, 377, 10946, 317811, 9227465, 267914296, 7778742049, 225851433717, 6557470319842, 190392490709135, 5527939700884757, 160500643816367088, 4660046610375530309, 135301852344706746049, 3928413764606871165730
OFFSET
0,2
FORMULA
G.f.: -13*x / ( -1+29*x+x^2 ). a(n) = 13*A049667(n). - R. J. Mathar, Apr 17 2011
a(n) = A000045(A008589(n)). - Michel Marcus, Nov 08 2013
MATHEMATICA
Table[Fibonacci[7n], {n, 0, 30}]
{a, b}={0, 13}; Do[Print[c={a, b}.{1, 29}]; a=b; b=c, {30}] (* Zak Seidov, Nov 02 2009 *)
PROG
(MuPAD) numlib::fibonacci(7*n) $ n = 0..25; // Zerinvary Lajos, May 09 2008
(Sage) [fibonacci(7*n) for n in range(0, 16)] # Zerinvary Lajos, May 15 2009
(Magma) [Fibonacci(7*n): n in [0..100]]; // Vincenzo Librandi, Apr 17 2011
(PARI) a(n)=fibonacci(7*n) \\ Charles R Greathouse IV, Jun 11 2015
KEYWORD
nonn,easy
AUTHOR
Artur Jasinski, Oct 28 2007
EXTENSIONS
Offset changed from 1 to 0 by Vincenzo Librandi, Apr 17 2011
STATUS
approved