# A324373 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 24
5 78
6 362
7 1473
8 5657
9 30045
10 150862
11 690604
12 3048236
13 14043152
14 84667280
15 484698208
16 2661357616
17 13753927840
18 73080151824
19 374413073328
20 1963753297884
21 10358706625196
22 69857764331270
23 447802562823975