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 | 9 |
| 2 | 15 |
| 3 | 39 |
| 4 | 105 |
| 5 | 119 |
| 6 | 153 |
| 7 | 177 |
| 8 | 209 |
| 9 | 3143 |
| 10 | 13169 |
| 11 | 19833 |
| 12 | 33567 |
| 13 | 53129 |
| 14 | 64439 |
| 15 | 88871 |
| 16 | 109865 |
| 17 | 122945 |
| 18 | 138543 |