n | a(n) |
---|---|
1 | 0 |
2 | 8 |
3 | 16 |
4 | 120 |
5 | 456 |
6 | 2232 |
7 | 10116 |
8 | 45792 |
9 | 212112 |
10 | 960336 |
11 | 4418388 |
12 | 20134008 |
13 | 92208780 |
14 | 421315344 |
15 | 1926779076 |
16 | 8809428456 |
17 | 40277366640 |
18 | 184164908040 |
19 | 842016117672 |
20 | 3849965354232 |
21 | 17602701446772 |
22 | 80483933441520 |
23 | 367989633268848 |
[0,8,16,120,456,2232,10116,45792,212112,960336, 4418388,20134008,92208780,421315344,1926779076, 8809428456,40277366640,184164908040,842016117672, 3849965354232,17602701446772,80483933441520, 367989633268848] |