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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 53 |
| 7 | 49541 |
| 8 | 813359 |
| 9 | 59243701 |
| 10 | 18007129909 |
| 11 | 26754412658849 |
| 12 | 922373240806979 |
| 13 | 42709276740325681463 |
| 14 | 5698447182281913432980459 |