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 | 0 |
| 1 | 1 |
| 2 | 24 |
| 3 | 432 |
| 4 | 6912 |
| 5 | 103680 |
| 6 | 1492992 |
| 7 | 20901888 |
| 8 | 286654464 |
| 9 | 3869835264 |
| 10 | 51597803520 |
| 11 | 681091006464 |
| 12 | 8916100448256 |
| 13 | 115909305827328 |
| 14 | 1497904875307008 |
| 15 | 19258776968232960 |
| 16 | 246512345193381888 |