# A143027 (b-file synthesized from sequence entry)
1 2
2 3
3 5
4 7
5 17
6 31
7 73
8 89
9 127
10 257
11 1801
12 2089
13 8191
14 65537
15 131071
16 178481
17 262657
18 524287
19 2099863
20 616318177
21 2147483647
22 4432676798593