id:A139712 - OEIS Search Results

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a(1)=1. For n >=2, a(n) = largest positive integer < a(n-1) that is not coprime to n, if such an integer exists. Otherwise, a(n) = smallest integer > a(n-1) that is not coprime to n.

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1, 2, 3, 2, 5, 4, 7, 6, 3, 2, 11, 10, 13, 12, 10, 8, 17, 16, 19, 18, 15, 14, 23, 22, 20, 18, 15, 14, 29, 28, 31, 30, 27, 26, 25, 24, 37, 36, 33, 32, 41, 40, 43, 42, 40, 38, 47, 46, 42, 40, 39, 38, 53, 52, 50, 49, 48, 46, 59, 58, 61, 60, 57, 56, 55, 54, 67, 66, 63, 62, 71, 70, 73 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Diana Mecum, Table of n, a(n) for n = 1..1021`
	CROSSREFS	`Cf. A139713.` `Adjacent sequences: A139709 A139710 A139711 this_sequence A139713 A139714 A139715` `Sequence in context: A127433 A055573 A072969 this_sequence A075365 A075274 A135737`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet (qq-quet(AT)mindspring.com), Apr 30 2008`
	EXTENSIONS	`More terms from Diana Mecum (diana.mecum(AT)gmail.com), Jul 22 2008`

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Last modified October 6 16:13 EDT 2008. Contains 144667 sequences.

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