# A066880 (b-file synthesized from sequence entry) 1 2 2 3 3 6 4 7 5 14 6 15 7 30 8 31 9 62 10 63 11 126 12 127 13 254 14 255 15 510 16 511 17 1022 18 1023 19 2046 20 2047 21 4094 22 4095 23 8190 24 8191 25 16382 26 16383 27 32766 28 32767 29 65534 30 65535 31 131070 32 131071 33 262142 34 262143 35 524286 36 524287 37 1048574 38 1048575 39 2097150 40 2097151 41 4194302 42 4194303