A050875 Binary numbers d(1)...d(j) such that d(i)=d(j+1-i) for all but 6 i.

33, 45, 51, 63, 128, 131, 133, 137, 145, 152, 155, 157, 161, 164, 167, 173, 181, 185, 188, 191, 193, 194, 199, 203, 211, 217, 218, 223, 227, 229, 230, 239, 247, 251, 253, 254, 514, 516, 519, 520, 523, 525, 528, 531, 533, 537