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%I #15 Mar 31 2012 14:02:27
%S 0,1,2,3,4,5,6,8,7,9,10,11,12,13,14,15,19,21,22,16,17,18,20,23,24,25,
%T 26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,51,52,56,58,59,60,62,
%U 63,64,42,43,44,45,46,47,48,49,50,53,54,55,57,61,65,66,67,68,69
%N Permutation of natural numbers induced by Catalan Automorphism *A089866 acting on the parenthesizations/binary trees encoded by A014486/A063171.
%C This bijection of binary trees is obtained when we apply bijection *A074680 to the left subtree and keep the right subtree intact.
%C .A...B...............B...C
%C ..\./.................\./
%C ...x...C....-->....A...x.................()..B.........B...()....
%C ....\./.............\./...................\./....-->....\./.....
%C .....x...D...........x...D.................x...C.........x...C..
%C ......\./.............\./...................\./...........\./...
%C .......x...............x.....................x.............x....
%C ................................................................
%C Compare to A154122.
%C See "Catalan bijections" OEIS-Wiki page for a detailed explanation how to obtain a given integer sequence from this definition.
%H A. Karttunen, <a href="http://oeis.org/wiki/Catalan_bijections">Catalan bijections</a>
%H A. Karttunen, <a href="/A089408/a089408.c.txt">C-program for computing this sequence</a>
%H <a href="/index/Per#IntegerPermutationCatAuto">Index entries for signature-permutations induced by Catalan automorphisms</a>
%o (Two Scheme-functions implementing this automorphism on list-structures/S-expressions, constructive (*A089866) and destructive (*A089866!) version:)
%o (define (*A089866 s) (cond ((pair? s) (cons (*A074680 (car s)) (cdr s))) (else s)))
%o (define (*A089866! s) (if (pair? s) (*A074680! (car s))) s)
%Y Row 4299 of A089840. Inverse of A089865. a(n) = A069770(A154122(A069770(n))).
%Y Number of cycles: A089844. Number of fixed-points: A005807 (prepended with two 1's). Max. cycle size: A089410. LCM of cycle sizes: A089845 (in each range limited by A014137 and A014138).
%K nonn
%O 0,3
%A _Antti Karttunen_, Dec 20 2003
%E Further comments and constructive version of Scheme-implementation added by _Antti Karttunen_, Jun 04 2011
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