n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 4 |
4 | 16 |
5 | 96 |
6 | 576 |
7 | 3368 |
8 | 20672 |
9 | 141760 |
10 | 1091200 |
11 | 9098112 |
12 | 79676928 |
13 | 726208640 |
14 | 6919738112 |
15 | 69344336896 |
16 | 731241201664 |
17 | 8076031881216 |
18 | 92856867250176 |
19 | 1106883171037184 |
20 | 13655807547883520 |
21 | 174298975125127168 |
22 | 2300708116863287296 |
23 | 31372716744306524160 |
[0,1,2,4,16,96,576,3368,20672,141760,1091200, 9098112,79676928,726208640,6919738112,69344336896, 731241201664,8076031881216,92856867250176, 1106883171037184,13655807547883520, 174298975125127168,2300708116863287296, 31372716744306524160] |