n | a(n) |
---|---|
1 | 2 |
2 | 2 |
3 | 3 |
4 | 7 |
5 | 26 |
6 | 130 |
7 | 779 |
8 | 5453 |
9 | 43622 |
10 | 392597 |
11 | 3925970 |
12 | 43185670 |
13 | 518228039 |
14 | 6736964507 |
15 | 94317503097 |
16 | 1414762546454 |
17 | 22636200743263 |
18 | 384815412635471 |
19 | 6926677427438474 |
20 | 131606871121331006 |
21 | 2632137422426620118 |
[2,2,3,7,26,130,779,5453,43622,392597,3925970, 43185670,518228039,6736964507,94317503097, 1414762546454,22636200743263,384815412635471, 6926677427438474,131606871121331006, 2632137422426620118] |