Number of nontrivial arithmetic progressions of primes between n and 2n.
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 3, 3, 3, 4, 4, 3, 3, 3
1 seqfan posts
Sat May 2 16:12:32 CEST 2009 [seqfan] Re: OEIS duplicate hunt