login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A120707 Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A120705/A120706. 2

%I #2 Mar 31 2012 14:02:29

%S 1,1,1,2,3,6,10,20,39,72,138,286,512

%N Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A120705/A120706.

%C The number of orbits to which the corresponding automorphisms partition the set of A000108(n) binary trees of n internal nodes.

%K nonn

%O 0,4

%A _Antti Karttunen_, Jun 28 2006

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 22 18:23 EDT 2024. Contains 374540 sequences. (Running on oeis4.)