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 | 3 |
| 3 | 5 |
| 4 | 9 |
| 5 | 13 |
| 6 | 25 |
| 7 | 33 |
| 8 | 57 |
| 9 | 81 |
| 10 | 129 |
| 11 | 177 |
| 12 | 289 |
| 13 | 385 |
| 14 | 609 |
| 15 | 833 |
| 16 | 1281 |
| 17 | 1729 |
| 18 | 2689 |
| 19 | 3585 |
| 20 | 5505 |
| 21 | 7425 |
| 22 | 11265 |
| 23 | 15105 |
| 24 | 23041 |
| 25 | 30721 |