# A227460 (b-file synthesized from sequence entry)
1 1
2 2
3 12
4 112
5 1440
6 23664
7 473984
8 11203200
9 305268480
10 9421739520
11 324874716672
12 12377880797184
13 516412532213760
14 23414906122352640
15 1146462496418119680
16 60286544709800361984
17 3388531521749583790080
18 202734601173679682027520
19 12863997904326532359782400