# A364475 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 18
4 94
5 529
6 3135
7 19270
8 121732
9 785496
10 5155167
11 34304706
12 230923653
13 1569684910
14 10759159000
15 74281473504
16 516089542684
17 3605685460750
18 25316226436086
19 178538289189108
20 1264131169628799
21 8982889404251721
22 64041351551534215