A108850 Number of 1's in the binary expansion of the repunits.

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

Offset

0,3

Links

Table of n, a(n) for n=0..68.

Example

a(3)=6 because 111 = '1101111' has 6 ones.

Crossrefs

Cf. A000120, A002275.

Sequence in context: A318845 A147866 A135702 * A111652 A159787 A184161

Adjacent sequences: A108847 A108848 A108849 * A108851 A108852 A108853

Keyword

easy,nonn,base

Author

Jason Earls, Jul 11 2005

Status

approved