# A020101 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 2
4 4
5 18
6 93
7 588
8 4324
9 36163
10 338611
11 3509240
12 39877721
13 493033635
14 6588722213
15 94638009964
16 1453983971265
17 23792464984331
18 413123710182464
19 7586453586987049
20 146901328548021943
21 2991445235886992291