n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 31 |
3 | 215 |
4 | 1561 |
5 | 11525 |
6 | 85591 |
7 | 636935 |
8 | 4743121 |
9 | 35329445 |
10 | 263175151 |
11 | 1960492055 |
12 | 14604592681 |
13 | 108796577765 |
14 | 810478516711 |
15 | 6037650189575 |
16 | 44977410078241 |
17 | 335058747180485 |
18 | 2496016680318271 |
19 | 18594050606753495 |
[1,5,31,215,1561,11525,85591,636935,4743121, 35329445,263175151,1960492055,14604592681, 108796577765,810478516711,6037650189575, 44977410078241,335058747180485,2496016680318271, 18594050606753495] |