# A177946 (b-file synthesized from sequence entry)
1 2
2 3
3 20
4 210
5 332640
6 8648640
7 70572902400
8 3016991577600
9 71241227785728000
10 2436552577639909048320000
11 205999445200465037721600000
12 28734252852655074735274328064000000
13 5372155913332392772506888374845440000000