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 | 9 |
| 3 | 187 |
| 4 | 11881 |
| 5 | 3720993 |
| 6 | 4652194849 |
| 7 | 21048197450115 |
| 8 | 362982575751004609 |
| 9 | 24187438805159042241345 |
| 10 | 6154694340999818634869088969 |
| 11 | 5974124007380479364088559506443355 |