# A020104 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 1
4 1
5 3
6 14
7 82
8 577
9 4665
10 42406
11 427909
12 4745900
13 57382240
14 751185684
15 10584889175
16 159735600270
17 2570291022523
18 43928610203109
19 794708493674423
20 15171707606511702
21 304813398276280546
22 6428791672736098776