# A046239 (b-file synthesized from sequence entry)
1 0
2 1
3 3
4 9
5 65
6 73
7 513
8 4097
9 4161
10 32769
11 262145
12 262657
13 2097153
14 16777217
15 16781313
16 134217729
17 1073741825
18 1073774593
19 8589934593
20 68719476737
21 68719738881