n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 6 |
4 | 25 |
5 | 104 |
6 | 484 |
7 | 2136 |
8 | 11664 |
9 | 71136 |
10 | 451584 |
11 | 3006720 |
12 | 21902400 |
13 | 176774400 |
14 | 1456185600 |
15 | 12758860800 |
16 | 117456998400 |
17 | 1181072793600 |
18 | 12023694950400 |
19 | 130072449024000 |
20 | 1451792885760000 |
21 | 17487355576320000 |
22 | 212389727477760000 |
23 | 2729844680048640000 |
[1,4,6,25,104,484,2136,11664,71136,451584,3006720, 21902400,176774400,1456185600,12758860800, 117456998400,1181072793600,12023694950400, 130072449024000,1451792885760000, 17487355576320000,212389727477760000, 2729844680048640000] |