# A372986 (b-file synthesized from sequence entry)
0 1
1 2
2 12
3 60
4 672
5 5400
6 88704
7 982800
8 21288960
9 300736800
10 8089804800
11 138940401600
12 4465572249600
13 90311261040000
14 3375972620697600
15 78570797104800000
16 3348964839732019200
17 88156434351585600000
18 4219695698062344192000
19 123947946698329353600000