n | a(n) |
---|---|
0 | 1 |
1 | 7 |
2 | 17 |
3 | 87 |
4 | 417 |
5 | 2347 |
6 | 13497 |
7 | 81607 |
8 | 504537 |
9 | 3192747 |
10 | 20529537 |
11 | 133876327 |
12 | 882924177 |
13 | 5879675307 |
14 | 39478170697 |
15 | 266973261127 |
16 | 1816729697097 |
17 | 12431013514667 |
18 | 85476914070417 |
19 | 590327766229607 |
20 | 4093067887259777 |
[1,7,17,87,417,2347,13497,81607,504537,3192747, 20529537,133876327,882924177,5879675307, 39478170697,266973261127,1816729697097, 12431013514667,85476914070417,590327766229607, 4093067887259777] |