# A020545 (b-file synthesized from sequence entry)
0 0
1 0
2 3
3 165
4 12972
5 1706460
6 372470760
7 127985964120
8 65545882234560
9 47784528317211840
10 47784706087589654400
11 63601467702843268598400
12 109903339976314925131660800
13 241457638625928074776576550400