# A121133 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 3 5 8 6 16 7 38 8 80 9 180 10 384 11 840 12 1792 13 3856 14 8192 15 17440 16 36864 17 77888 18 163840 19 344192 20 720896 21 1507584 22 3145728 23 6554112 24 13631488 25 28312576 26 58720256 27 121636864 28 251658240 29 520097792 30 1073741824 31 2214600704 32 4563402752