id:A065879 - OEIS Search Results

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Lowest positive number that is n times the number of 1's in its binary expansion, or 0 if no such number exists.

+0
3

1, 2, 6, 4, 10, 12, 21, 8, 18, 20, 55, 24, 0, 42, 60, 16, 34, 36, 0, 40, 126, 110, 69, 48, 0, 0, 81, 84, 116, 120, 155, 32, 66, 68, 0, 72, 185, 0, 156, 80, 205, 252, 172, 220, 180, 138, 0, 96, 0, 0, 204, 0, 212, 162, 0, 168, 228, 232, 295, 240, 366, 310, 378, 64, 130 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(23) is 69 since 69 is written in binary as 1000101, 69/(1+0+0+0+1+0+1)=23 and there is no lower possibility (neither 23 nor 46 are divisible by their number of binary 1's).`
	CROSSREFS	`A003634 is the base 10 equivalent. Cf. A000120, A049445, A058898, A065413, A065878, A065880.` `Sequence in context: A113571 A119018 A094748 this_sequence A065880 A090546 A059909` `Adjacent sequences: A065876 A065877 A065878 this_sequence A065880 A065881 A065882`
	KEYWORD	`base,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Nov 26 2001`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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