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 | 2 |
| 4 | 5 |
| 5 | 12 |
| 6 | 35 |
| 7 | 104 |
| 8 | 342 |
| 9 | 1041 |
| 10 | 3026 |
| 11 | 6512 |
| 12 | 23227 |
| 13 | 38238 |
| 14 | 108204 |
| 15 | 278426 |
| 16 | 544635 |
| 17 | 825654 |
| 18 | 3049903 |
| 19 | 3375582 |
| 20 | 12108377 |
| 21 | 21899125 |
| 22 | 36960289 |
| 23 | 53317222 |
| 24 | 220706640 |
| 25 | 271264826 |