A118731 Numbers n such that 2^n has odd digit sum.

0, 4, 5, 7, 8, 10, 12, 16, 18, 19, 20, 22, 23, 24, 25, 27, 28, 29, 30, 31, 34, 35, 38, 39, 40, 48, 49, 52, 53, 56, 59, 62, 63, 66, 68, 69, 72, 75, 81, 87, 88, 89, 92, 93, 94, 96, 97, 99, 100, 101, 104, 105, 108, 109, 110, 111, 114, 118, 119, 121, 125, 127, 131, 132, 133

Offset

1,2

Links

Table of n, a(n) for n=1..65.

Mathematica

Select[Range[0, 133], Mod[ Plus @@ IntegerDigits[2^# ], 2] == 1 &] (* Ray Chandler, Jun 10 2006 *)

Crossrefs

Cf. A118732, A118735, A076203.

Sequence in context: A225387 A037259 A219115 * A076203 A153327 A189707

Adjacent sequences: A118728 A118729 A118730 * A118732 A118733 A118734

Keyword

base,nonn

Author

Zak Seidov, May 22 2006

Status

approved