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 | 6 |
| 2 | 66 |
| 3 | 1091 |
| 4 | 24891 |
| 5 | 737061 |
| 6 | 27110418 |
| 7 | 1199197442 |
| 8 | 62240034172 |
| 9 | 3718021355407 |
| 10 | 251730371459590 |
| 11 | 19076604651022143 |
| 12 | 1601423150451641820 |
| 13 | 147628858305489901288 |
| 14 | 14834881996161804192069 |