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!)
A074687 Permutation of natural numbers induced by the Catalan bijection gmA074687! acting on the parenthesizations encoded by A014486/A063171. 4

%I #6 Oct 15 2015 10:55:23

%S 0,1,3,2,6,7,8,4,5,15,14,16,17,18,19,20,22,13,9,21,10,11,12,39,40,41,

%T 37,38,43,42,44,45,46,47,48,49,50,52,51,53,54,55,60,61,62,34,33,63,36,

%U 27,23,56,57,64,35,24,58,26,32,29,59,25,28,30,31,113,112,114,115,116

%N Permutation of natural numbers induced by the Catalan bijection gmA074687! acting on the parenthesizations encoded by A014486/A063171.

%H A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (with the complete Scheme source)

%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

%o (Scheme function implementing this automorphism on list-structures:)

%o (define (gmA074687! s) (cond ((pair? s) (gmA074687! (car s)) (gmrobl! s) (gmA074687! (cdr s)))) s)

%Y Inverse of A074688 and also a(n) = A057163(A074688(A057163(n))). Cf. A074681-A074690. Occurs in A073200 as row 5572440.

%K nonn

%O 0,3

%A _Antti Karttunen_, Sep 11 2002

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 April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)