# A077517 (b-file synthesized from sequence entry)
1 1
2 2
3 30
4 420
5 5040
6 60480
7 725760
8 8709120
9 95800320
10 1053803520
11 11591838720
12 127510225920
13 13006043043840
14 143066473482240
15 1573731208304640
16 160520583247073280
17 1765726415717806080
18 180104094403216220160