n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 32 |
3 | 120 |
4 | 400 |
5 | 1232 |
6 | 3584 |
7 | 9984 |
8 | 26880 |
9 | 70400 |
10 | 180224 |
11 | 452608 |
12 | 1118208 |
13 | 2723840 |
14 | 6553600 |
15 | 15597568 |
16 | 36765696 |
17 | 85917696 |
18 | 199229440 |
19 | 458752000 |
20 | 1049624576 |
21 | 2387607552 |
22 | 5402263552 |
23 | 12163481600 |
24 | 27262976000 |
25 | 60850962432 |
[1,7,32,120,400,1232,3584,9984,26880,70400,180224, 452608,1118208,2723840,6553600,15597568,36765696, 85917696,199229440,458752000,1049624576, 2387607552,5402263552,12163481600,27262976000, 60850962432] |