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

Offset: 1

Author

Patrick De Geest, Dec 15 2000

Keywords

• nonn
• easy

Links

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

Crossrefs

Cf. A000069, A001969, A059009-A059014.

Cf. A000120, A023416, A071295.

Programs

Haskell

a059011 n = a059011_list !! (n-1)
a059011_list = filter (odd . a071295) [0..]
-- Reinhard Zumkeller, Aug 09 2014

Mathematica

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

PARI

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

Formula

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