n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 60 |
3 | 432 |
4 | 7320 |
5 | 53680 |
6 | 803520 |
7 | 6495720 |
8 | 100874752 |
9 | 764738496 |
10 | 12756110400 |
11 | 89493288192 |
12 | 1568774615040 |
13 | 11278053084480 |
14 | 180228847518720 |
15 | 1310982643872000 |
16 | 22974417331646464 |
17 | 168479281019744640 |
18 | 2521788545778163200 |
19 | 20190830281379049600 |
[1,4,60,432,7320,53680,803520,6495720,100874752, 764738496,12756110400,89493288192,1568774615040, 11278053084480,180228847518720,1310982643872000, 22974417331646464,168479281019744640, 2521788545778163200,20190830281379049600] |