# A356421 (b-file synthesized from sequence entry) 1 3 2 15 3 61 4 255 5 2043 6 4093 7 32765 8 65535 9 262141 10 8388599 11 33554397 12 134217699 13 268435453 14 1073741821 15 17179869159 16 137438953463 17 274877906937 18 1099511627761 19 8796093022179 20 17592186044409 21 70368744177649 22 140737488355323 23 281474976710635 24 562949953421243