A068535 Numbers n such that 2^n (mod n) = 2^n (mod n^2).

1, 2, 4, 8, 16, 32, 35, 64, 128, 256, 297, 512, 1024, 1093, 2048, 2186, 2590, 3279, 3511, 4096, 4372, 5465, 6558, 7022, 7651, 8192, 8744, 9837, 10533, 10930, 13116, 14044, 14209, 16384, 21066, 23175, 24012, 24577, 26592, 28088, 31599, 32768