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 | 21 |
| 1 | 22 |
| 2 | 945 |
| 3 | 967 |
| 4 | 41559 |
| 5 | 42526 |
| 6 | 1827651 |
| 7 | 1870177 |
| 8 | 80375085 |
| 9 | 82245262 |
| 10 | 3534676089 |
| 11 | 3616921351 |
| 12 | 155445372831 |
| 13 | 159062294182 |
| 14 | 6836061728475 |
| 15 | 6995124022657 |
| 16 | 300631270680069 |
| 17 | 307626394702726 |
| 18 | 13220939848194561 |