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 | 1 |
| 3 | 7 |
| 4 | 22 |
| 5 | 385 |
| 6 | 490 |
| 7 | 1255 |
| 8 | 3010 |
| 9 | 3718 |
| 10 | 12310 |
| 11 | 17977 |
| 12 | 21637 |
| 13 | 75175 |
| 14 | 89134 |
| 15 | 204226 |
| 16 | 386155 |
| 17 | 451276 |
| 18 | 831820 |
| 19 | 1300156 |
| 20 | 1741630 |
| 21 | 5392783 |
| 22 | 6185689 |
| 23 | 10619863 |
| 24 | 18004327 |
| 25 | 20506255 |
| 26 | 34262962 |
| 27 | 49995925 |
| 28 | 64112359 |
| 29 | 104651419 |
| 30 | 150198136 |