# A038054 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 12
4 80
5 800
6 10752
7 181888
8 3714048
9 88915968
10 2442936320
11 75776712704
12 2619618852864
13 99879826948096
14 4163954627051520
15 188441538173337600
16 9200521811924615168
17 482067547423055544320
18 26980938272912248406016