n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 36 |
4 | 144 |
5 | 3600 |
6 | 400 |
7 | 19600 |
8 | 78400 |
9 | 6350400 |
10 | 6350400 |
11 | 768398400 |
12 | 768398400 |
13 | 129859329600 |
14 | 129859329600 |
15 | 129859329600 |
16 | 519437318400 |
17 | 150117385017600 |
18 | 16679709446400 |
19 | 6021375110150400 |
20 | 240855004406016 |
21 | 26761667156224 |
[1,4,36,144,3600,400,19600,78400,6350400,6350400, 768398400,768398400,129859329600,129859329600, 129859329600,519437318400,150117385017600, 16679709446400,6021375110150400,240855004406016, 26761667156224] |