A053353 Numbers n such that 273*2^n+1 is prime.

1, 2, 5, 10, 13, 40, 41, 45, 56, 64, 72, 86, 94, 121, 160, 213, 338, 352, 833, 1014, 1072, 1098, 1297, 1381, 1952, 1990, 2421, 2600, 3474, 3533, 3602, 4361, 5846, 6234, 6926, 7562, 8238, 10866, 11240, 11765, 26408, 26648, 28258, 53233, 53405, 67344, 73453