id:A129612 - OEIS Search Results

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Signature-permutation of a Catalan automorphism, row 251 of A089840.

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0, 1, 3, 2, 7, 8, 6, 4, 5, 17, 18, 20, 21, 22, 16, 19, 14, 9, 10, 15, 11, 13, 12, 45, 46, 48, 49, 50, 54, 55, 57, 58, 59, 61, 62, 63, 64, 44, 47, 53, 56, 60, 42, 51, 37, 23, 24, 38, 25, 26, 27, 43, 52, 39, 28, 29, 41, 33, 35, 36, 40, 30, 34, 31, 32, 129, 130, 132, 133, 134 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Automorphism A089863 = SPINE(A129612). See the definition given in A122203.`
	LINKS	`A. Karttunen, Table of n, a(n) for n = 0..2055` `A. Karttunen, Prolog-program which illustrates the construction of this and similar nonrecursive Catalan automorphisms.` `Index entries for signature-permutations of Catalan automorphisms`
	PROGRAM	`(Constructive and destructive Scheme implementation of this automorphism. These act on S-expressions, i.e. list-structures:)` `(define (A129612 s) (cond ((pair? s) (let ((t (A089863 s))) (cons (car t) (A089859 (cdr t))))) (else s)))` `(define (A129612! s) (cond ((pair? s) (A089863! s) (A089859! (cdr s)))) s)`
	CROSSREFS	`Inverse: A129611. Differs from A082345 for the first time at n=49, where A082345(49)=27, while a(49)=26.` `Sequence in context: A130959 A130928 A069770 this_sequence A082345 A122327 A130999` `Adjacent sequences: A129609 A129610 A129611 this_sequence A129613 A129614 A129615`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), May 22 2007`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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