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 | 2 |
| 3 | 22 |
| 4 | 400 |
| 5 | 22228 |
| 6 | 3136370 |
| 7 | 1158560776 |
| 8 | 1147204164108 |
| 9 | 2980178704765860 |
| 10 | 20513821200001569410 |
| 11 | 373243563814532182524614 |
| 12 | 17941038966060235808302667164 |