# A015487 (b-file synthesized from sequence entry)
0 1
1 3
2 10
3 100
4 2800
5 229600
6 56022400
7 40896352000
8 89481218176000
9 587175753670912000
10 11557967535258231808000
11 682497982956998588262400000
12 120903152684866385913507635200000