# A101901 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 10
4 30
5 110
6 484
7 2514
8 15142
9 104126
10 806772
11 6965090
12 66374766
13 692629618
14 7860173564
15 96428710490
16 1272217776422
17 17968286438066
18 270569090589308
19 4328163151246858
20 73311692500174358
21 1311041890981700358