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 | 195984 |
| 3 | 16779168 |
| 4 | 397998672 |
| 5 | 4629497040 |
| 6 | 34417510848 |
| 7 | 187489533504 |
| 8 | 814881802320 |
| 9 | 2975548760568 |
| 10 | 9486548517600 |
| 11 | 27052958750688 |
| 12 | 70486228096704 |
| 13 | 169931081461008 |
| 14 | 384163595996544 |
| 15 | 820166650027200 |
| 16 | 1668890114013264 |
| 17 | 3249630946490544 |
| 18 | 6096882726702288 |