n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 44 |
4 | 344 |
5 | 2856 |
6 | 24816 |
7 | 223016 |
8 | 2056256 |
9 | 19344472 |
10 | 184956240 |
11 | 1792088296 |
12 | 17558218048 |
13 | 173659691928 |
14 | 1731556718224 |
15 | 17387182158184 |
16 | 175670235597120 |
17 | 1784561125349464 |
18 | 18216639085961552 |
19 | 186762117058304104 |
[1,1,6,44,344,2856,24816,223016,2056256,19344472, 184956240,1792088296,17558218048,173659691928, 1731556718224,17387182158184,175670235597120, 1784561125349464,18216639085961552, 186762117058304104] |