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 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 11 |
| 6 | 13 |
| 7 | 27 |
| 8 | 54 |
| 9 | 106 |
| 10 | 168 |
| 11 | 378 |
| 12 | 142 |
| 13 | 733 |
| 14 | 1597 |
| 15 | 1283 |
| 16 | 3418 |
| 17 | 8204 |
| 18 | 10112 |
| 19 | 24644 |
| 20 | 7829 |
| 21 | 32866 |
| 22 | 78136 |
| 23 | 178741 |
| 24 | 37002 |
| 25 | 256392 |
| 26 | 650596 |
| 27 | 1402914 |
| 28 | 286854 |
| 29 | 2053463 |