The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 11 |
| 5 | 17 |
| 6 | 19 |
| 7 | 29 |
| 8 | 31 |
| 9 | 41 |
| 10 | 49 |
| 11 | 71 |
| 12 | 161 |
| 13 | 251 |
| 14 | 449 |
| 15 | 769 |
| 16 | 881 |
| 17 | 1079 |
| 18 | 1429 |
| 19 | 3431 |
| 20 | 4159 |
| 21 | 4801 |
| 22 | 6049 |
| 23 | 8749 |
| 24 | 19601 |
| 25 | 24751 |
| 26 | 246401 |
| 27 | 388961 |
| 28 | 1267111 |
[3,5,7,11,17,19,29,31,41,49,71,161,251,449,769, 881,1079,1429,3431,4159,4801,6049,8749,19601, 24751,246401,388961,1267111] |