id:A141819 - OEIS Search Results

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a(1)=1. a(n) = the smallest integer > a(n-1) that is coprime to the number of 1's in the binary representation of n.

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	OFFSET	`1,2`
	EXAMPLE	`19 in binary is 10011, which has 3 ones. a(18) = 23. Checking the integers > 23, 24 is not coprime to 3. But 25 is coprime to 3. So a(19) = 25.`
	CROSSREFS	`Cf. A000120, A141820.` `Sequence in context: A133813 A079734 A050730 this_sequence A097904 A094387 A050744` `Adjacent sequences: A141816 A141817 A141818 this_sequence A141820 A141821 A141822`
	KEYWORD	`more,nonn`
	AUTHOR	`Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Jul 08 2008`

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.