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 | 6 |
| 2 | 87 |
| 3 | 2468 |
| 4 | 131799 |
| 5 | 13400550 |
| 6 | 2646848041 |
| 7 | 1030386755856 |
| 8 | 796631252763576 |
| 9 | 1227659952939056640 |
| 10 | 3777547269650299331856 |
| 11 | 23228194648169000672639616 |
| 12 | 285544368619000766118426358016 |
| 13 | 7018967175754802830514246125923840 |
| 14 | 345031382341287335424234252089128848384 |