id:A069768 - OEIS Search Results

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Permutation of natural numbers induced by the automorphism SwapDownCdr! acting on the rooted planar binary trees encoded by A014486. (I.e. flip all the branches on the rightmost path of the tree).

+0
25

0, 1, 3, 2, 8, 7, 6, 4, 5, 22, 21, 20, 17, 18, 19, 16, 14, 9, 10, 15, 11, 12, 13, 64, 63, 62, 58, 59, 61, 57, 54, 45, 46, 55, 48, 49, 50, 60, 56, 53, 44, 47, 51, 42, 37, 23, 24, 38, 25, 26, 27, 52, 43, 39, 28, 29, 40, 30, 31, 32, 41, 33, 34, 35, 36, 196, 195, 194, 189, 190 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`A. Karttunen, Gatomorphisms (Includes the complete Scheme program for computing this sequence)` `Index entries for sequences that are permutations of the natural numbers`
	PROGRAM	`(Scheme function implementing this automorphism on list-structures:) (define (SwapDownCdr! s) (cond ((pair? s) (swap! s) (SwapDownCdr! (car s)))) s)`
	CROSSREFS	`Inverse permutation: A069767. Also its car/cdr-flipped conjugate, i.e. A069768(n) = A057163(A069767(A057163(n))). Cf. also A057162.` `Sequence in context: A073292 A073297 A127377 this_sequence A122301 A086425 A122354` `Adjacent sequences: A069765 A069766 A069767 this_sequence A069769 A069770 A069771`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen Apr 16 2002`

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Last modified September 8 13:07 EDT 2008. Contains 143486 sequences.

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