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 | 8 |
| 2 | 135 |
| 3 | 6858 |
| 4 | 2068373 |
| 5 | 133799496 |
| 6 | 80566783622 |
| 7 | 30199064929748 |