# A052145 (b-file synthesized from sequence entry)
1 1
2 9
3 200
4 8820
5 653184
6 73180800
7 11564467200
8 2451889440000
9 671854030848000
10 231125690776780800
11 97537253236899840000
12 49549698749529538560000
13 29829250083328819200000000
14 20999962511521107738624000000
15 17094073187896757112117657600000