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 | 4 |
| 4 | 8 |
| 5 | 21 |
| 6 | 1518 |
| 7 | 2510 |
| 8 | 4100 |
| 9 | 11181 |
| 10 | 18414 |
| 11 | 30374 |
| 12 | 50121 |
| 13 | 82924 |
| 14 | 136341 |
| 15 | 611212 |
| 16 | 4477981 |
| 17 | 7351356 |
| 18 | 12086260 |
| 19 | 19861634 |
| 20 | 32648059 |
| 21 | 53646155 |
| 22 | 144857355 |
| 23 | 238062163 |
| 24 | 643132294 |
| 25 | 1736990151 |
| 26 | 4691130396 |
| 27 | 7709412048 |