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) |
|---|---|
| 5 | 1 |
| 6 | 1 |
| 7 | 6 |
| 8 | 12 |
| 9 | 43 |
| 10 | 106 |
| 11 | 322 |
| 12 | 864 |
| 13 | 2483 |
| 14 | 6829 |
| 15 | 19226 |
| 16 | 53293 |
| 17 | 148866 |
| 18 | 413501 |
| 19 | 1151506 |
| 20 | 3200184 |
| 21 | 8901478 |
| 22 | 24742852 |
| 23 | 68800520 |
| 24 | 191275736 |
| 25 | 531888416 |