# A324138 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 24
5 120
6 720
7 5020
8 39755
9 351518
10 3425572
11 36419844
12 419026188
13 5182797757
14 68535001302
15 964404124479
16 14383519018582
17 226579159065496
18 3758349089828472
19 65466833442028670
20 1194655878120996337
21 22788580047064423474
22 453513206778006345040