# A046231 (b-file synthesized from sequence entry)
1 0
2 1
3 5
4 17
5 65
6 257
7 1025
8 4097
9 16385
10 65537
11 262145
12 1048577
13 4194305
14 16777217
15 67108865
16 268435457
17 1073741825
18 4294967297