n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 14 |
4 | 88 |
5 | 694 |
6 | 6578 |
7 | 72792 |
8 | 920904 |
9 | 13109088 |
10 | 207360912 |
11 | 3608233056 |
12 | 68495486640 |
13 | 1408631978064 |
14 | 31197601660080 |
15 | 740303842925184 |
16 | 18738231641600256 |
17 | 503937595069600896 |
18 | 14349899305396086912 |
19 | 431322634732516137216 |
20 | 13646841876634025159424 |
[1,1,3,14,88,694,6578,72792,920904,13109088, 207360912,3608233056,68495486640,1408631978064, 31197601660080,740303842925184,18738231641600256, 503937595069600896,14349899305396086912, 431322634732516137216,13646841876634025159424] |