a(n) = the smallest positive integral multiple of 2^n not in the range of the Euler phi function, or -1 if no such multiple exists.
3, 14, 68, 152, 304, 608, 1984, 3968, 12032, 24064, 48128, 96256, 192512, 385024
1 seqfan posts
Fri Nov 19 01:14:41 CET 2010 [seqfan] Re: Nonmembers of Range of Euler Phi Function