a(n) = the smallest positive integer such that (the n-th prime)+a(n)! is prime, or -1 if no such prime exists.
1, 2, 2, 3, 2, 3, 2, 4, 3, 2, 3, 3, 2, 4, 3, 3, 2, 3, 3, 2, 3, 4, 3, 4, 3, 2, 3, 2, 5, 4, 4, 3, 2, 4
1 seqfan posts
Mon Mar 1 22:22:19 CET 2010 [seqfan] prime + factorial = prime