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) |
|---|---|
| 3 | 3 |
| 4 | 7 |
| 5 | 19 |
| 6 | 25 |
| 7 | 51 |
| 8 | 109 |
| 9 | 153 |
| 10 | 213 |
| 11 | 289 |
| 12 | 1121 |
| 13 | 1121 |
| 14 | 1121 |
| 15 | 3997 |
| 16 | 7457 |
| 17 | 12017 |
| 18 | 12719 |
| 19 | 20299 |
| 20 | 24503 |
| 21 | 24503 |
| 22 | 25817 |
| 23 | 25817 |
| 24 | 128755 |
| 25 | 128755 |
| 26 | 219207 |
| 27 | 456929 |
| 28 | 456929 |
| 29 | 761619 |
| 30 | 883537 |