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 | 8 |
| 2 | 216 |
| 3 | 288 |
| 4 | 54000 |
| 5 | 7200 |
| 6 | 3704400 |
| 7 | 35280 |
| 8 | 7938000 |
| 9 | 16800 |
| 10 | 78262800 |
| 11 | 304920 |
| 12 | 4923832914000 |
| 13 | 535392 |
| 14 | 32464832400 |
| 15 | 240240 |
| 16 | 265832869302000 |
| 17 | 2082880800 |
| 18 | 50052680603125200 |
| 19 | 387017631 |
| 20 | 186286292470278000 |