# A198513 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 28
4 320
5 5556
6 129600
7 3756936
8 132872192
9 5679982288
10 286769980416
11 16732506817280
12 1115928688967680
13 84383735744758464
14 7163164003950936064
15 676619301019539271040
16 70674282825174467215360
17 8117559039240651749888256