n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 4 |
5 | 1 |
6 | 96 |
7 | 289 |
8 | 512 |
9 | 25281 |
10 | 265600 |
11 | 2391001 |
12 | 36972288 |
13 | 405301681 |
14 | 21023744 |
15 | 54720993825 |
16 | 1244339070976 |
17 | 13293650868481 |
18 | 324381631315968 |
19 | 2266027617084841 |
20 | 14819020931072000 |
21 | 896776708870156401 |
[0,0,1,4,1,96,289,512,25281,265600,2391001, 36972288,405301681,21023744,54720993825, 1244339070976,13293650868481,324381631315968, 2266027617084841,14819020931072000, 896776708870156401] |