n | a(n) |
---|---|
1 | 2 |
2 | 3 |
3 | 5 |
4 | 7 |
5 | 11 |
6 | 31 |
7 | 71 |
8 | 73 |
9 | 97 |
10 | 311 |
11 | 733 |
12 | 971 |
13 | 991 |
14 | 9311 |
15 | 999331 |
16 | 1111111111111111111 |
17 | 11111111111111111111111 |
[2,3,5,7,11,31,71,73,97,311,733,971,991,9311, 999331,1111111111111111111, 11111111111111111111111] |