OFFSET
0,2
LINKS
FORMULA
From R. J. Mathar, Apr 17 2011: (Start)
G.f.: -13*x / ( -1+29*x+x^2 ).
a(n) = 13*A049667(n). (End)
Sum_{n>=1} (-1)^(n+1)/(a(n)*a(n+1)) = (sqrt(845)-29)/338. - Amiram Eldar, Apr 06 2026
MATHEMATICA
Table[Fibonacci[7n], {n, 0, 30}]
(* Alternative: *)
{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
(SageMath) [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
CROSSREFS
KEYWORD
nonn,easy,changed
AUTHOR
Artur Jasinski, Oct 28 2007
EXTENSIONS
Offset changed from 1 to 0 by Vincenzo Librandi, Apr 17 2011
STATUS
approved