# A013296 (b-file synthesized from sequence entry)
0 0
1 1
2 6
3 150
4 7560
5 642600
6 82328400
7 14799985200
8 3550699152000
9 1095489931536000
10 422416533258720000
11 199001229578030880000
12 112442434205652270720000
13 75042084306026165328000000