# A026089 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 16
4 93
5 518
6 2932
7 16709
8 95849
9 552749
10 3201848
11 18616751
12 108592239
13 635175153
14 3724193120
15 21881993115
16 128810517855
17 759515272026
18 4485048436792
19 26520334731436
20 157006248094198