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 | 1 |
| 2 | 5 |
| 3 | 89 |
| 4 | 5885 |
| 5 | 1518897 |
| 6 | 1558435125 |
| 7 | 6386478643785 |
| 8 | 104648850228298925 |
| 9 | 6858476391221411106209 |
| 10 | 1797922152786660462507074405 |
| 11 | 1885261615172756172119161342909753 |