Gray code ordering of the prime numbers: a(n) = A000040(1+A003188(n)).
2, 3, 7, 5, 17, 19, 13, 11, 41, 43, 53, 47, 31, 37, 29, 23, 97, 101, 107, 103, 127, 131
2 seqfan posts
Sun Jan 4 19:22:23 CET 2009 [seqfan] Re: Question related to sequence A083188