This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 15 |
| 5 | 65 |
| 6 | 105 |
| 7 | 135 |
| 8 | 155 |
| 9 | 235 |
| 10 | 249 |
| 11 | 1407 |
| 12 | 1745 |
| 13 | 30207 |
| 14 | 40407 |
| 15 | 68115 |