n | a(n) |
---|---|
0 | 1 |
1 | 8 |
2 | 50 |
3 | 400 |
4 | 2402 |
5 | 19216 |
6 | 120100 |
7 | 960800 |
8 | 5764802 |
9 | 46118416 |
10 | 288240100 |
11 | 2305920800 |
12 | 13847054404 |
13 | 110776435232 |
14 | 692352720200 |
15 | 5538821761600 |
16 | 33232930569602 |
17 | 265863444556816 |
18 | 1661646528480100 |
19 | 13293172227840800 |
[1,8,50,400,2402,19216,120100,960800,5764802, 46118416,288240100,2305920800,13847054404, 110776435232,692352720200,5538821761600, 33232930569602,265863444556816,1661646528480100, 13293172227840800] |