The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A066932 a(n) is the denominator of b(n) where b(n)=1/b(n-1)+1/b(n-2) with b(1)=1 and b(2)=2. 3

%I

%S 1,1,2,6,21,224,10848,4843293,98262557120,989063619297120960,

%T 197348115975871052843094930213,

%U 380244324677612882673067751880150651746235378560

%N a(n) is the denominator of b(n) where b(n)=1/b(n-1)+1/b(n-2) with b(1)=1 and b(2)=2.

%C lim_{n->infty} b(n)=sqrt(2) with geometric convergence since abs(b(n)-sqrt(2))<2*2^(-n/2)

%F a(n+1)=A057677(n)*A057677(n-1) - _Benoit Cloitre_, Oct 25 2005

%F a(n) is the numerator of b(n) where b(n)=1/(b(n-1)+ b(n-2)) with b(1)=1 and b(2)=2 [From _Mark Dols_, Jul 17 2009]

%Y Cf. A057677.

%K nonn,frac

%O 1,3

%A _Zak Seidov_, Oct 24 2002

%E Edited by Benoit Cloitre, Oct 25 2005

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified July 31 14:49 EDT 2021. Contains 346374 sequences. (Running on oeis4.)