id:A098144 - OEIS Search Results

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a(n) = smallest number greater than a(n-1) having a largest proper divisor that is greater than and coprime to a(n-1); a(1) = 1.

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1, 4, 9, 10, 21, 22, 39, 40, 63, 64, 99, 100, 153, 154, 237, 238, 363, 364, 549, 550, 831, 832, 1251, 1252, 1881, 1882, 2829, 2830, 4251, 4252, 6381, 6382, 9579, 9580, 14373, 14374, 21567, 21568, 32355, 32356, 48537, 48538, 72813, 72814, 109227, 109228 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A032742(a(n+1))>A032742(a(n)) and GCD(A032742(a(n+1)), A032742(a(n)))=1;` `for n>1: a(2n) = a(2n-1) + 1,` `a(2n+1) = 3(a(2n)/2 + 2 - 0^(a(2n) mod 4)).`
	CROSSREFS	`Sequence in context: A131457 A072525 A107621 this_sequence A109412 A061766 A109448` `Adjacent sequences: A098141 A098142 A098143 this_sequence A098145 A098146 A098147`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 28 2004`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

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