# A187547 (b-file synthesized from sequence entry)
0 1
1 3
2 66
3 2500
4 134260
5 9335088
6 796938912
7 80671795776
8 9446603680800
9 1256254443100800
10 187033518310129920
11 30821040496874234880
12 5569495264653352381440
13 1095113648992295923200000
14 232773183612995427763200000
15 53186532693832607435089920000