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) |
|---|---|
| 5 | 81 |
| 6 | 125 |
| 7 | 7425 |
| 8 | 33075 |
| 9 | 318500 |
| 10 | 333396 |
| 11 | 41674500 |
| 12 | 42688800 |
| 13 | 7347809700 |
| 14 | 7453660500 |
| 15 | 7539055524 |
| 16 | 30435780375 |
| 17 | 8862899245200 |
| 18 | 8919011301200 |
| 19 | 3236906114442000 |
| 20 | 3251542559481216 |
| 21 | 3264138293130000 |
| 22 | 3275055780469200 |