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 | 4 |
| 3 | 2268 |
| 4 | 135 |
| 5 | 9 |
| 6 | 461056 |
| 7 | 15936 |
| 8 | 448 |
| 9 | 16 |
| 10 | 160977375 |
| 11 | 3789250 |
| 12 | 69000 |
| 13 | 1125 |
| 14 | 25 |
| 15 | 85624508376 |
| 16 | 1485395280 |
| 17 | 19994688 |
| 18 | 223560 |
| 19 | 2376 |
| 20 | 36 |
| 21 | 64363893844726 |
| 22 | 862907827866 |
| 23 | 9138674195 |
| 24 | 79086196 |
| 25 | 596820 |
| 26 | 4459 |
| 27 | 49 |
| 28 | 64928246784463872 |