# A365282 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 12
4 96
5 900
6 10800
7 157080
8 2634240
9 50455440
10 1089849600
11 26157479040
12 690848040960
13 19924295751360
14 623024501299200
15 20996216063222400
16 758724126031872000
17 29267547577396128000
18 1200407895406514995200