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 | 0 |
| 2 | 2 |
| 3 | 5 |
| 4 | 20 |
| 5 | 74 |
| 6 | 90 |
| 7 | 185 |
| 8 | 377 |
| 9 | 986 |
| 10 | 1493 |
| 11 | 5165 |
| 12 | 16109 |
| 13 | 16868 |
| 14 | 31657 |
| 15 | 52393 |
| 16 | 101349 |
| 17 | 105572 |
| 18 | 241882 |
| 19 | 284002 |
| 20 | 685541 |
| 21 | 1437353 |
| 22 | 1751296 |
| 23 | 1853866 |
| 24 | 5588305 |
| 25 | 9565544 |
| 26 | 13305524 |
| 27 | 20875482 |
| 28 | 67070173 |
| 29 | 135628357 |
| 30 | 192085714 |
| 31 | 264428585 |
| 32 | 345869506 |
| 33 | 426063725 |
| 34 | 434120338 |
| 35 | 672657850 |