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 | 2 |
| 2 | 7 |
| 3 | 80 |
| 4 | 4381 |
| 5 | 1069742 |
| 6 | 1080096067 |
| 7 | 4405584869660 |
| 8 | 72092808533798521 |
| 9 | 4723015159635987920282 |
| 10 | 1237987266193328694390243007 |
| 11 | 1298087832233881093828346620725800 |