n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 21 |
4 | 124 |
5 | 1880 |
6 | 20046 |
7 | 391419 |
8 | 6195288 |
9 | 147481299 |
10 | 3121373690 |
11 | 87790122816 |
12 | 2329580861268 |
13 | 75790954533385 |
14 | 2415630777959686 |
15 | 89478235732836705 |
16 | 3323789119614522416 |
17 | 138402773923330655700 |
[1,1,2,21,124,1880,20046,391419,6195288,147481299, 3121373690,87790122816,2329580861268, 75790954533385,2415630777959686,89478235732836705, 3323789119614522416,138402773923330655700] |