id:A098162 - OEIS Search Results

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a(n+1) = smallest number greater than a(n) having with a(n) a common divisor which is used before as such a common divisor at most once; a(1) = 1.

+0
2

1, 2, 3, 6, 8, 10, 15, 18, 24, 28, 32, 40, 45, 54, 60, 70, 77, 84, 96, 104, 117, 126, 140, 150, 165, 176, 187, 204, 216, 234, 247, 266, 280, 300, 315, 336, 352, 368, 391, 408, 432, 450, 475, 494, 520, 540, 567, 588, 616, 638, 660, 690, 713, 744, 768, 800, 825 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) - a(n-1) = GCD(a(n),a(n-1) for n>1.`
	CROSSREFS	`Cf. A098163.` `Sequence in context: A089422 A051935 A082667 this_sequence A076627 A020489 A002240` `Adjacent sequences: A098159 A098160 A098161 this_sequence A098163 A098164 A098165`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Aug 30 2004`

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

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