A230745 Odious Loeschian numbers.

1, 4, 7, 13, 16, 19, 21, 25, 28, 31, 37, 49, 52, 61, 64, 67, 73, 76, 79, 81, 84, 91, 93, 97, 100, 103, 109, 112, 117, 121, 124, 127, 133, 148, 151, 157, 171, 181, 193, 196, 199, 208, 211, 217, 223, 229, 241, 244, 247, 256, 259, 268, 271, 273, 279, 283, 289, 292, 301, 304, 307, 309, 313

Offset

1,2

Comments

Intersection of A000069 and A003136.

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Prog

(PARI) is(n)=hammingweight(n)%2 && #bnfisintnorm(bnfinit('z^2+'z+1), n) \\ Charles R Greathouse IV, Mar 18 2014

Crossrefs

Sequence in context: A310800 A274628 A060751 * A191201 A084089 A202822

Adjacent sequences: A230742 A230743 A230744 * A230746 A230747 A230748

Keyword

nonn,base

Author

Irina Gerasimova, Oct 31 2013

Extensions

a(41) inserted, a(60) corrected by Charles R Greathouse IV, Mar 18 2014

Status

approved