# A110951 (b-file synthesized from sequence entry)
3 0
4 2
5 10
6 117
7 1218
8 8544
9 102528
10 1073328
11 13174560
12 167191920
13 2194456320
14 34592423040
15 566748161280
16 8894849241600
17 159020867174400
18 3016954215475200
19 59837217568128000
20 1189832713214745600