a(n) = smallest number b such that b+n is the first number after b with phi(phi((b)) = phi(phi(b+n)).
1, 4, 45, 14, 58, 25, 68, 17, 183, 41, 27, 85, 274, 101, 875, 38, 184, 53, 478, 196, 848
1 seqfan posts
Thu Nov 12 01:31:28 CET 2009 [seqfan] New Unfriendly Sequence: A167781