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 | 6 |
| 2 | 48 |
| 3 | 605 |
| 4 | 11196 |
| 5 | 280440 |
| 6 | 8981460 |
| 7 | 353283128 |
| 8 | 16567072675 |
| 9 | 905357065354 |
| 10 | 56632746126107 |
| 11 | 3997082539456084 |
| 12 | 314584709388906568 |
| 13 | 27340439653453247728 |
| 14 | 2602372304420672868499 |
| 15 | 269388182085308601450047 |