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 | 4 |
| 2 | 100 |
| 3 | 6244 |
| 4 | 727780 |
| 5 | 136330084 |
| 6 | 37455423460 |
| 7 | 14188457293924 |
| 8 | 7087539575975140 |
| 9 | 4514046217675793764 |
| 10 | 3570250394992512270820 |
| 11 | 3433125893070920512725604 |
| 12 | 3944372161432193963534198500 |
| 13 | 5336301013125557989981503385444 |
| 14 | 8396749419933421378024498580446180 |