# A109363 (b-file synthesized from sequence entry) 0 -1 1 0 2 5 3 18 4 47 5 108 6 233 7 486 8 995 9 2016 10 4061 11 8154 12 16343 13 32724 14 65489 15 131022 16 262091 17 524232 18 1048517 19 2097090 20 4194239 21 8388540 22 16777145 23 33554358 24 67108787 25 134217648 26 268435373 27 536870826 28 1073741735 29 2147483556 30 4294967201 31 8589934494 32 17179869083 33 34359738264