# A012803 (b-file synthesized from sequence entry)
0 1
1 2
2 48
3 1080
4 112000
5 9941120
6 2204340864
7 473940603136
8 177280211177472
9 70742192264802304
10 40258836839175946240
11 25560794070720075464704
12 20755313571874776988942336
13 19066653840381485832858304512