# A048617 (b-file synthesized from sequence entry)
0 2
1 2
2 8
3 72
4 1152
5 28800
6 1036800
7 50803200
8 3251404800
9 263363788800
10 26336378880000
11 3186701844480000
12 458885065605120000
13 77551576087265280000
14 15200108913103994880000
15 3420024505448398848000000
16 875526273394790105088000000
17 253027093011094340370432000000