id:A090368 - OEIS Search Results

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a(1) = 1; for n>1, smallest divisor > 1 of 2n-1.

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1, 3, 5, 7, 3, 11, 13, 3, 17, 19, 3, 23, 5, 3, 29, 31, 3, 5, 37, 3, 41, 43, 3, 47, 7, 3, 53, 5, 3, 59, 61, 3, 5, 67, 3, 71, 73, 3, 7, 79, 3, 83, 5, 3, 89, 7, 3, 5, 97, 3, 101, 103, 3, 107, 109, 3, 113, 5, 3, 7, 11, 3, 5, 127, 3, 131, 7, 3, 137, 139, 3, 11, 5, 3, 149, 151, 3, 5, 157, 3, 7 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Remi Eismann, Table of n, a(n) for n = 1..10000`
	CROSSREFS	`Bisection of A020639.` `Cf. A100773.` `Sequence in context: A121573 A130140 A051417 this_sequence A120374 A088836 A076565` `Adjacent sequences: A090365 A090366 A090367 this_sequence A090369 A090370 A090371`
	KEYWORD	`nonn`
	AUTHOR	`Lekraj Beedassy (blekraj(AT)yahoo.com), Nov 27 2003`
	EXTENSIONS	`More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Dec 02 2003` `Definition corrected by Remi Eismann, May 08 2007`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

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