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) |
|---|---|
| 0 | 0 |
| 1 | 3 |
| 2 | 14 |
| 3 | 12 |
| 4 | 346 |
| 5 | 1518 |
| 6 | 12144 |
| 7 | 65902 |
| 8 | 370966 |
| 9 | 1405228 |
| 10 | 9288699 |
| 11 | 45012717 |
| 12 | 115961111 |
| 13 | 439407638 |
| 14 | 3515261104 |
| 15 | 28122088832 |
| 16 | 102906398156 |
| 17 | 365487513373 |
| 18 | 1398021200734 |
| 19 | 14998866871497 |
| 20 | 24623503331351 |
| 21 | 387722889932058 |
| 22 | 1194434486643964 |
| 23 | 7171290102136087 |