Literal reading of the prime factorization of n.
1, 2, 3, 22, 5, 23, 7, 23, 32, 25, 11, 223, 13, 27, 35, 24, 17, 232, 19, 225, 37, 211, 23
1 seqfan posts
Thu Sep 15 15:30:17 CEST 2011 [seqfan] Re: Do 20 and 105 eventually reach a prime in these sequences?