n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 21 |
5 | 186 |
6 | 2113 |
7 | 27856 |
8 | 422481 |
9 | 7241480 |
10 | 138478561 |
11 | 2923183474 |
12 | 67520866405 |
13 | 1694065383154 |
14 | 45878853274945 |
15 | 1333966056696224 |
16 | 41446945223914337 |
17 | 1370476678395567376 |
18 | 48051281596087884289 |
[0,1,2,21,186,2113,27856,422481,7241480,138478561, 2923183474,67520866405,1694065383154, 45878853274945,1333966056696224,41446945223914337, 1370476678395567376,48051281596087884289] |