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 | 2 |
| 3 | 3 |
| 4 | 11 |
| 5 | 344 |
| 6 | 355 |
| 7 | 51819 |
| 8 | 52174 |
| 9 | 260515 |
| 10 | 573204 |
| 11 | 4846147 |
| 12 | 5419351 |
| 13 | 37362253 |
| 14 | 42781604 |
| 15 | 122925461 |
| 16 | 411557987 |
| 17 | 534483448 |
| 18 | 2549491779 |
| 19 | 3083975227 |
| 20 | 17969367914 |
| 21 | 21053343141 |
| 22 | 881156436695 |
| 23 | 902209779836 |
| 24 | 2685575996367 |