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 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 26 |
| 6 | 66 |
| 7 | 169 |
| 8 | 437 |
| 9 | 1130 |
| 10 | 2926 |
| 11 | 7597 |
| 12 | 19749 |
| 13 | 51381 |
| 14 | 133812 |
| 15 | 348755 |
| 16 | 909464 |
| 17 | 2372862 |
| 18 | 6193720 |