# A129629 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 7 5 14 6 31 7 63 8 123 9 255 10 511 11 1015 12 2047 13 4092 14 8176 15 16383 16 32767 17 65503 18 131061 19 262143 20 524223 21 1048575 22 2097151 23 4194162 24 8388607 25 16777208 26 33554175 27 67108863 28 134217693 29 268434943 30 536870911 31 1073741823