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 | 1 |
| 2 | 17 |
| 3 | 19 |
| 4 | 23 |
| 5 | 121 |
| 6 | 131 |
| 7 | 311 |
| 8 | 313 |
| 9 | 467 |
| 10 | 5137 |
| 11 | 56413 |
| 12 | 66781 |
| 13 | 143369 |