n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 32 |
3 | 212 |
4 | 1504 |
5 | 10848 |
6 | 79696 |
7 | 596160 |
8 | 4520000 |
9 | 34673940 |
10 | 268538048 |
11 | 2096374656 |
12 | 16475970896 |
13 | 130234435648 |
14 | 1034568731408 |
15 | 8254368150320 |
16 | 66112337392256 |
17 | 531345216883584 |
18 | 4283682906179728 |
19 | 34632004320564416 |
[1,4,32,212,1504,10848,79696,596160,4520000, 34673940,268538048,2096374656,16475970896, 130234435648,1034568731408,8254368150320, 66112337392256,531345216883584,4283682906179728, 34632004320564416] |