id:A093696 - OEIS Search Results

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Numbers n such that all divisors of n have an odd number of 1's in their binary expansions.

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1, 2, 4, 7, 8, 11, 13, 14, 16, 19, 22, 26, 28, 31, 32, 37, 38, 41, 44, 47, 49, 52, 56, 59, 61, 62, 64, 67, 73, 74, 76, 79, 82, 88, 91, 94, 97, 98, 103, 104, 107, 109, 112, 118, 121, 122, 124, 127, 128, 131, 133, 134, 137, 143, 146, 148, 151, 152, 157, 158, 164, 167, 173 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`14 is in the sequence because its divisors are [1, 2, 7, 14] and in binary:` `1, 10, 111 and 1110, all have an odd number of 1's.`
	CROSSREFS	`Sequence in context: A080308 A089559 A165741 this_sequence A074204 A030355 A080704` `Adjacent sequences: A093693 A093694 A093695 this_sequence A093697 A093698 A093699`
	KEYWORD	`nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), May 16 2004`

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

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