n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 6 |
3 | 8 |
4 | 54 |
5 | 144 |
6 | 636 |
7 | 2160 |
8 | 8550 |
9 | 31520 |
10 | 121716 |
11 | 462000 |
12 | 1780156 |
13 | 6840288 |
14 | 26436024 |
15 | 102245472 |
16 | 396589446 |
17 | 1540427328 |
18 | 5994280644 |
19 | 23356702512 |
20 | 91133123796 |
21 | 355991626848 |
22 | 1392115710024 |
23 | 5449199307552 |
24 | 21349205067996 |
[1,0,6,8,54,144,636,2160,8550,31520,121716,462000, 1780156,6840288,26436024,102245472,396589446, 1540427328,5994280644,23356702512,91133123796, 355991626848,1392115710024,5449199307552, 21349205067996] |