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 | 55 |
| 2 | 6336 |
| 3 | 817991 |
| 4 | 108435745 |
| 5 | 14479521761 |
| 6 | 1937528668711 |
| 7 | 259423766712000 |
| 8 | 34741645659770711 |
| 9 | 4652799879944138561 |
| 10 | 623139489426439754945 |
| 11 | 83456125990631342400791 |
| 12 | 11177167872295392172767936 |
| 13 | 1496943834332592837945956455 |
| 14 | 200483802581126644843760725601 |