# A074504 (b-file synthesized from sequence entry)
0 3
1 11
2 69
3 521
4 4113
5 32801
6 262209
7 2097281
8 16777473
9 134218241
10 1073742849
11 8589936641
12 68719480833
13 549755822081
14 4398046527489
15 35184372121601
16 281474976776193
17 2251799813816321
18 18014398509744129
19 144115188076380161