Odious primes: primes with odd number of 1's in binary expansion.
2, 7, 11, 13, 19, 31, 37, 41, 47, 59, 61, 67, 73, 79, 97, 103, 107, 109, 127, 131, 137
1 seqfan posts
Mon Oct 25 17:34:14 CEST 2010 [seqfan] checking A176620 (p! factorization with A050376)