id:A092401 - OEIS Search Results

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List of pairs n, 3n, where n is the least unused number so far.

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1, 3, 2, 6, 4, 12, 5, 15, 7, 21, 8, 24, 9, 27, 10, 30, 11, 33, 13, 39, 14, 42, 16, 48, 17, 51, 18, 54, 19, 57, 20, 60, 22, 66, 23, 69, 25, 75, 26, 78, 28, 84, 29, 87, 31, 93, 32, 96, 34, 102, 35, 105, 36, 108, 37, 111, 38, 114, 40, 120, 41, 123, 43, 129, 44, 132, 45, 135, 46 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A permutation of the natural numbers.`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000`
	FORMULA	`a(2n-1) = A007417(n), a(2n) = 3*A007417(n).`
	CROSSREFS	`Sequence in context: A091018 A160795 A113320 this_sequence A116626 A162255 A074323` `Adjacent sequences: A092398 A092399 A092400 this_sequence A092402 A092403 A092404`
	KEYWORD	`easy,nice,nonn`
	AUTHOR	`DELEHAM Philippe (kolotoko(AT)wanadoo.fr), Mar 22 2004`

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Last modified December 4 08:07 EST 2009. Contains 170310 sequences.

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