# A139208 (b-file synthesized from sequence entry) 1 1 2 3 3 7 4 15 5 21 6 31 7 45 8 63 9 93 10 105 11 127 12 189 13 217 14 255 15 315 16 341 17 455 18 511 19 819 20 1023 21 1365 22 2047 23 3591 24 3855 25 4095 26 5461 27 8191 28 12483 29 13107 30 16383 31 21845 32 29127 33 32767 34 53261 35 55831 36 60787 37 65535 38 87381 39 131071 40 178481 41 182361 42 209715 43 258111 44 262143 45 349525 46 430185 47 479349 48 524287