# A227464 (b-file synthesized from sequence entry)
1 1
2 2
3 10
4 80
5 884
6 12480
7 214600
8 4352000
9 101696400
10 2690754560
11 79516330400
12 2595903897600
13 92782304200000
14 3603511009280000
15 151115361757776000
16 6805240665866240000
17 327547876406050976000
18 16780408888535285760000
19 911669878205463707200000