# A020109 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 19
5 93
6 544
7 3742
8 29514
9 262342
10 2594262
11 28248628
12 335844793
13 4328666216
14 60120364101
15 895125421054
16 14222548356739
17 240203038913808
18 4296965473902564
19 81164903395937307
20 1614279745319197539