id:A036552 - OEIS Search Results

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List of pairs n,2n, where n is the least unused number so far.

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1, 2, 3, 6, 4, 8, 5, 10, 7, 14, 9, 18, 11, 22, 12, 24, 13, 26, 15, 30, 16, 32, 17, 34, 19, 38, 20, 40, 21, 42, 23, 46, 25, 50, 27, 54, 28, 56, 29, 58, 31, 62, 33, 66, 35, 70, 36, 72, 37, 74, 39, 78, 41, 82, 43, 86, 44, 88, 45, 90, 47, 94, 48, 96, 49, 98, 51, 102 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A permutation of the natural numbers. Inverse permutation is A065037.`
	REFERENCES	`P. Erdos, R. Freud and N. Hegyvari, Arithmetical properties of permutations of integers, Acta Math. Hungar. 41 (1983), no. 1-2, 169-176.`
	LINKS	`Index entries for sequences that are permutations of the natural numbers`
	CROSSREFS	`Alternating merge of A003159 and A036554. Cf. A065037.` `Sequence in context: A099900 A138728 A082332 this_sequence A112975 A109890 A086537` `Adjacent sequences: A036549 A036550 A036551 this_sequence A036553 A036554 A036555`
	KEYWORD	`nonn,easy,nice`
	AUTHOR	`Tom Verhoeff (Tom.Verhoeff(AT)acm.org)`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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