id:A123502 - OEIS Search Results

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Signature permutation of a Catalan automorphism: first recurse into the left subtree of the right hand side subtree of a binary tree and after that apply *A123498 at the root.

+0
3

0, 1, 2, 3, 4, 7, 5, 6, 8, 9, 10, 17, 16, 18, 11, 20, 12, 14, 15, 13, 19, 21, 22, 23, 24, 25, 26, 27, 45, 46, 44, 42, 49, 48, 43, 47, 50, 28, 29, 54, 53, 55, 30, 57, 31, 37, 38, 32, 39, 40, 41, 33, 61, 34, 51, 52, 35, 56, 58, 59, 36, 60, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`Index entries for signature-permutations of Catalan automorphisms`
	PROGRAM	`(Scheme function, destructive implementation of this automorphism acting on S-expressions:) (define (A123502! s) (cond ((and (pair? s) (pair? (cdr s))) (A123502! (cadr s)))) (*A123498! s) s)`
	CROSSREFS	`Inverse: A123501. A057502(n) = A083927(a(A057123(n))) = A083927(A085160(A057123(n))).` `Sequence in context: A138676 A035532 A123498 this_sequence A073209 A073197 A084470` `Adjacent sequences: A123499 A123500 A123501 this_sequence A123503 A123504 A123505`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), Oct 11 2006`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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