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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 5 |
| 3 | 13 |
| 4 | 17 |
| 5 | 59 |
| 6 | 81 |
| 7 | 219 |
| 8 | 257 |
| 9 | 899 |
| 10 | 1349 |
| 11 | 3437 |
| 12 | 4353 |
| 13 | 15235 |
| 14 | 20805 |
| 15 | 56173 |
| 16 | 65537 |
| 17 | 229379 |
| 18 | 344069 |
| 19 | 876557 |
| 20 | 1118225 |
| 21 | 3913787 |
| 22 | 5313617 |
| 23 | 14399195 |
| 24 | 16842753 |
| 25 | 58949635 |
| 26 | 88424453 |
| 27 | 225271821 |
| 28 | 285282321 |