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 | 291480 |
| 5 | 6692424 |
| 6 | 153614760 |
| 7 | 3526063752 |
| 8 | 80931227016 |
| 9 | 1857565708968 |
| 10 | 42634594787160 |
| 11 | 978544945823832 |
| 12 | 22459264078075992 |
| 13 | 515478463349872200 |
| 14 | 11831064537706447464 |
| 15 | 271542137952854806776 |
| 16 | 6232321082672399260152 |
| 17 | 143041632747658763159736 |