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 | 0 |
| 2 | 7 |
| 3 | 13 |
| 4 | 19 |
| 5 | 31 |
| 6 | 37 |
| 7 | 61 |
| 8 | 79 |
| 9 | 313 |
| 10 | 613 |
| 11 | 5851 |
| 12 | 7741 |
| 13 | 8467 |
| 14 | 13963 |
| 15 | 14449 |
| 16 | 35449 |
| 17 | 51169 |
| 18 | 193201 |
| 19 | 344293 |
| 20 | 387433 |
| 21 | 574219 |