# A370926 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 28
5 220
6 2520
7 34510
8 519680
9 8527680
10 154831600
11 3151456000
12 71830281600
13 1809141934600
14 49559087177600
15 1459865188782000
16 45970426027926400
17 1543274016213529600
18 55120521154277779200
19 2088917638216953544000
20 83717918489664018560000