# A217523 (b-file synthesized from sequence entry)
0 0
1 1
2 10
3 450
4 46440
5 8580600
6 2485501200
7 1038647610000
8 591422976144000
9 440175696904944000
10 414834426527320800000
11 482828797838174467680000
12 680160665982184667280000000
13 1140497273795065245115056000000
14 2244756232031112064775686176000000