n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 218 |
5 | 2331 |
6 | 29152 |
7 | 417607 |
8 | 6746700 |
9 | 121312441 |
10 | 2401341056 |
11 | 51857779689 |
12 | 1212621122176 |
13 | 30509979042115 |
14 | 821524617293304 |
15 | 23563369209520711 |
16 | 717014609781379568 |
17 | 23064363484845390513 |
[1,1,4,25,218,2331,29152,417607,6746700,121312441, 2401341056,51857779689,1212621122176, 30509979042115,821524617293304,23563369209520711, 717014609781379568,23064363484845390513] |