n | a(n) |
---|---|
2 | 4 |
3 | 24 |
4 | 152 |
5 | 1080 |
6 | 8152 |
7 | 63976 |
8 | 518232 |
9 | 4299728 |
10 | 36360872 |
11 | 312284536 |
12 | 2716694880 |
13 | 23891215320 |
14 | 212064567160 |
15 | 1897551819416 |
[4,24,152,1080,8152,63976,518232,4299728,36360872, 312284536,2716694880,23891215320,212064567160, 1897551819416] |