id:A108850 - OEIS Search Results

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Number of 1's in the binary expansion of the repunits.

+0
1

0, 1, 3, 6, 6, 9, 8, 10, 12, 18, 15, 16, 21, 17, 20, 23, 28, 33, 30, 35, 34, 38, 39, 39, 37, 39, 44, 47, 51, 48, 50, 48, 59, 62, 55, 55, 56, 62, 60, 64, 66, 64, 68, 62, 77, 76, 78, 76, 76, 73, 83, 81, 86, 105, 89, 94, 94, 103, 97, 93, 89, 90, 105, 109, 105, 104, 102, 106, 107 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`a(3)=6 because 111 = '1101111' has 6 ones.`
	CROSSREFS	`Cf. A000120, A002275.` `Sequence in context: A025500 A147866 A135702 this_sequence A111652 A159787 A147849` `Adjacent sequences: A108847 A108848 A108849 this_sequence A108851 A108852 A108853`
	KEYWORD	`easy,nonn,base`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jul 11 2005`

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.

AT&T Labs Research