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 | 24 |
| 2 | 552 |
| 3 | 12696 |
| 4 | 291732 |
| 5 | 6703488 |
| 6 | 154034496 |
| 7 | 3539441664 |
| 8 | 81330144060 |
| 9 | 1868823662376 |
| 10 | 42942280730712 |
| 11 | 986738081076264 |
| 12 | 22673505553878564 |
| 13 | 520997277758500752 |
| 14 | 11971601073631152624 |
| 15 | 275086336118245407888 |