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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 39 |
| 6 | 6472 |
| 7 | 311552 |
| 8 | 5576682 |
| 9 | 56289710 |
| 10 | 389130774 |
| 11 | 2059061646 |
| 12 | 8924241327 |
| 13 | 33134160010 |
| 14 | 108698226956 |
| 15 | 322211640480 |