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 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 13 |
| 5 | 23 |
| 6 | 43 |
| 7 | 281 |
| 8 | 359 |
| 9 | 487 |
| 10 | 577 |
| 11 | 1579 |
| 12 | 1663 |
| 13 | 1741 |
| 14 | 3191 |
| 15 | 9209 |
| 16 | 11257 |
| 17 | 12743 |
| 18 | 13093 |
| 19 | 17027 |
| 20 | 26633 |
| 21 | 104243 |
| 22 | 134227 |
| 23 | 152287 |
| 24 | 700897 |
| 25 | 1205459 |
| 26 | 1896463 |
| 27 | 2533963 |
| 28 | 2674381 |
| 29 | 7034611 |