A140266 - OEIS

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A140266

Inverse permutation of A140265.

1, 2, 3, 6, 8, 4, 7, 5, 9, 18, 20, 16, 24, 26, 22, 12, 14, 10, 19, 17, 21, 13, 11, 15, 25, 23, 27, 54, 56, 52, 60, 62, 58, 48, 50, 46, 72, 74, 70, 78, 80, 76, 66, 68, 64, 36, 38, 34, 42, 44, 40, 30, 32, 28, 55, 53, 57, 49, 47, 51, 61, 59, 63, 37, 35, 39, 31, 29, 33, 43, 41, 45 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	LINKS	`A. Karttunen, Table of n, a(n) for n = 1..729` `Index entries for sequences that are permutations of the natural numbers`
	FORMULA	`a(n) = Z->N(A117966(n-1)), where Z->N(z) = 2z if z>0 else 2\|z\|+1.`
	PROG	`(Scheme:) (string-append (define (A140266 n) (Z->N (A117966 (- n 1))))` `(define (Z->N n) (if (positive? n) (* n 2) (+ 1 (* 2 (- n))))))`
	CROSSREFS	`Inverse: A140265. a(n) = A140264(n-1)+1.` `Sequence in context: A088414 A133441 A086254 * A140265 A191453 A191454` `Adjacent sequences: A140263 A140264 A140265 * A140267 A140268 A140269`
	KEYWORD	`nonn`
	AUTHOR	`Antti Karttunen (His-Firstname.His-Surname(AT)gmail.com), May 19 2008`

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Last modified February 14 11:32 EST 2012. Contains 205623 sequences.