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 | 4 |
| 3 | 13 |
| 4 | 22 |
| 5 | 61 |
| 6 | 280 |
| 7 | 832 |
| 8 | 2373 |
| 9 | 7225 |
| 10 | 24371 |
| 11 | 74664 |
| 12 | 229729 |
| 13 | 715055 |
| 14 | 2264780 |
| 15 | 7040309 |
| 16 | 21916773 |
| 17 | 68434305 |
| 18 | 214187227 |
| 19 | 668160424 |
| 20 | 2084764226 |
| 21 | 6510150515 |
| 22 | 20333712284 |
| 23 | 63475055481 |
| 24 | 198151996889 |
| 25 | 618702544012 |
| 26 | 1931805153845 |