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 | 8 |
| 3 | 176 |
| 4 | 5888 |
| 5 | 238848 |
| 6 | 10770432 |
| 7 | 518909952 |
| 8 | 26156466176 |
| 9 | 1362414338048 |
| 10 | 72751723839488 |
| 11 | 3961437637574656 |
| 12 | 219123329636761600 |
| 13 | 12278352550322765824 |
| 14 | 695492547259800748032 |
| 15 | 39759203500044029263872 |