# A067412 (b-file synthesized from sequence entry)
0 1
1 5
2 40
3 320
4 2560
5 20480
6 163840
7 1310720
8 10485760
9 83886080
10 671088640
11 5368709120
12 42949672960
13 343597383680
14 2748779069440
15 21990232555520
16 175921860444160
17 1407374883553280
18 11258999068426240