n | a(n) |
---|---|
0 | 1 |
1 | 18 |
2 | 252 |
3 | 3168 |
4 | 44472 |
5 | 634368 |
6 | 9124092 |
7 | 131601852 |
8 | 1900243080 |
9 | 27449395092 |
10 | 396572715092 |
11 | 5729777752772 |
12 | 82786984432932 |
13 | 1196161590550776 |
14 | 17282993079833922 |
15 | 249717254801438778 |
16 | 3608098064502340024 |
[1,18,252,3168,44472,634368,9124092,131601852, 1900243080,27449395092,396572715092,5729777752772, 82786984432932,1196161590550776,17282993079833922, 249717254801438778,3608098064502340024] |