n | a(n) |
---|---|
3 | 1 |
4 | 8 |
5 | 40 |
6 | 160 |
7 | 560 |
8 | 1792 |
9 | 5376 |
10 | 15360 |
11 | 42240 |
12 | 112640 |
13 | 292864 |
14 | 745472 |
15 | 1863680 |
16 | 4587520 |
17 | 11141120 |
18 | 26738688 |
19 | 63504384 |
20 | 149422080 |
21 | 348651520 |
22 | 807403520 |
23 | 1857028096 |
24 | 4244635648 |
25 | 9646899200 |
26 | 21810380800 |
27 | 49073356800 |
28 | 109924319232 |
[1,8,40,160,560,1792,5376,15360,42240,112640, 292864,745472,1863680,4587520,11141120,26738688, 63504384,149422080,348651520,807403520,1857028096, 4244635648,9646899200,21810380800,49073356800, 109924319232] |