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 | 6 |
| 3 | 31 |
| 4 | 806 |
| 5 | 20306 |
| 6 | 2558556 |
| 7 | 320327931 |
| 8 | 200525284806 |
| 9 | 125368356709806 |
| 10 | 391901483074853556 |
| 11 | 1224770494838892134806 |
| 12 | 19138263752352528498478556 |