A059011 - OEIS

A059011

Odd number of 0's and 1's in binary expansion.

2, 8, 11, 13, 14, 32, 35, 37, 38, 41, 42, 44, 47, 49, 50, 52, 55, 56, 59, 61, 62, 128, 131, 133, 134, 137, 138, 140, 143, 145, 146, 148, 151, 152, 155, 157, 158, 161, 162, 164, 167, 168, 171, 173, 174, 176, 179, 181, 182, 185, 186, 188, 191, 193, 194, 196, 199

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..10000

FORMULA

A071295(a(n)) is odd. - Reinhard Zumkeller, Aug 09 2014

MATHEMATICA

Select[Range[200], EvenQ[IntegerLength[#, 2]]&&OddQ[DigitCount[#, 2, 1]]&] (* Harvey P. Dale, Oct 16 2012 *)

PROG

(PARI) is(n)=hammingweight(n)%2 && hammingweight(bitneg(n, #binary(n)))%2 \\ Charles R Greathouse IV, Mar 26 2013

(Haskell)