# A012542 (b-file synthesized from sequence entry)
0 1
1 0
2 12
3 240
4 8400
5 549120
6 53608896
7 7360813824
8 1377976654080
9 339091656130560
10 106266069932321792
11 41339215216164073472
12 19547389576904471367680
13 11040327077609014366371840