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 | 4 |
| 5 | 7 |
| 6 | 22 |
| 7 | 28 |
| 8 | 39 |
| 9 | 130 |
| 10 | 135 |
| 11 | 214 |
| 12 | 610 |
| 13 | 766 |
| 14 | 2152 |
| 15 | 2575 |
| 16 | 22972 |
| 17 | 42688 |
| 18 | 85711 |
| 19 | 85863 |
| 20 | 112066 |
| 21 | 538507 |
| 22 | 631714 |