id:A080414 - OEIS Search Results

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Take the rightmost three binary digits of n (for n<4 padded with leading zeros) and rotate right 1 digit.

+0
4

0, 4, 1, 5, 2, 6, 3, 7, 8, 12, 9, 13, 10, 14, 11, 15, 16, 20, 17, 21, 18, 22, 19, 23, 24, 28, 25, 29, 26, 30, 27, 31, 32, 36, 33, 37, 34, 38, 35, 39, 40, 44, 41, 45, 42, 46, 43, 47, 48, 52, 49, 53, 50, 54, 51, 55, 56, 60, 57, 61, 58, 62, 59, 63, 64, 68, 65, 69, 66, 70, 67, 71, 72 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`For n>7: a(n) = 8*floor(n/8) + a(n mod 8);` `permutation of natural numbers with inverse = A080413: A080413(a(n))=n, a(A080413(n))=n;` `a(a(n))=A080413(n), A080413(A080413(n))=a(n), a(a(a(n)))=n.`
	LINKS	`Index entries for sequences that are permutations of the natural numbers`
	EXAMPLE	`a(2)=a('010')='001'=1; a(3)=a('011')='101'=5; a(4)=a('100')='010'=2; a(5)=a('101')='110'=6;` `a(20)=a('10'100')='10'010'=18; a(21)=a('10'101')='10'110'=22.`
	CROSSREFS	`Cf. A007088, A004442, A064429, A080412.` `Sequence in context: A131230 A076063 A035590 this_sequence A067061 A115210 A030352` `Adjacent sequences: A080411 A080412 A080413 this_sequence A080415 A080416 A080417`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Feb 17 2003`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

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