n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 19 |
3 | 187 |
4 | 1177 |
5 | 10186 |
6 | 84442 |
7 | 665842 |
8 | 5078668 |
9 | 42573268 |
10 | 343023418 |
11 | 2665464058 |
12 | 21440629558 |
13 | 167644287550 |
14 | 1330569327310 |
15 | 10641989818078 |
16 | 82797155054782 |
17 | 644097780350332 |
18 | 5102709814966162 |
19 | 39499844158337962 |
20 | 307777892529889642 |
21 | 2406854983109480302 |
[1,4,19,187,1177,10186,84442,665842,5078668, 42573268,343023418,2665464058,21440629558, 167644287550,1330569327310,10641989818078, 82797155054782,644097780350332,5102709814966162, 39499844158337962,307777892529889642, 2406854983109480302] |