# A252997 (b-file synthesized from sequence entry)
1 218
2 189648
3 720240
4 119967120
5 129705984
6 517941905
7 707902440
8 1321744320
9 98890370304
10 99080219520
11 119922568640
12 139834382688
13 347612467648
14 580542318720
15 952717920000
16 1064902900320
17 1153644808680
18 2255573174400
19 3903820736256
20 6859688278905
21 10944640212480
22 14424196864000