n | a(n) |
---|---|
1 | 1 |
2 | 19 |
3 | 115 |
4 | 694 |
5 | 4244 |
6 | 25771 |
7 | 156627 |
8 | 952152 |
9 | 5791155 |
10 | 35212909 |
11 | 214118912 |
12 | 1302044409 |
13 | 7917515074 |
14 | 48145113993 |
15 | 292763221173 |
16 | 1780247911592 |
17 | 10825410249051 |
18 | 65827639273982 |
19 | 400287647868551 |
20 | 2434086938990655 |
[1,19,115,694,4244,25771,156627,952152,5791155, 35212909,214118912,1302044409,7917515074, 48145113993,292763221173,1780247911592, 10825410249051,65827639273982,400287647868551, 2434086938990655] |