# A020105 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 20
5 95
6 560
7 3858
8 30478
9 271253
10 2685396
11 29270807
12 348322597
13 4493361501
14 62457724854
15 930620100319
16 14796859595059
17 250066927156482
18 4476197996101024
19 84600142126309336
20 1683542828313555775