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 | 612 |
| 3 | 15912 |
| 4 | 417690 |
| 5 | 11027016 |
| 6 | 292215924 |
| 7 | 7764594552 |
| 8 | 206732329947 |
| 9 | 5512862131920 |
| 10 | 147193418922264 |
| 11 | 3934078651195056 |
| 12 | 105236603919467748 |
| 13 | 2817102935690367408 |
| 14 | 75458114348849127000 |
| 15 | 2022277464549156603600 |