# A172320 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 16 5 32 6 64 7 128 8 256 9 512 10 1024 11 2047 12 4092 13 8180 14 16352 15 32688 16 65344 17 130624 18 261120 19 521984 20 1043456 21 2085888 22 4169729 23 8335366 24 16662552 25 33308752 26 66584816 27 133104288 28 266077952 29 531894784 30 1063267584