a(n) = 1 if the n-th prime == 1 mod 6, otherwise a(n) = 0.
0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1
2 seqfan posts
Wed Jun 17 16:56:43 CEST 2009 [seqfan] Re: Suggested method to generate A004080 b-file