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 | 0 |
| 1 | 1 |
| 2 | 5 |
| 3 | 89 |
| 4 | 24305 |
| 5 | 1664474849 |
| 6 | 7382162541380960705 |
| 7 | 139566915517602820239076685726696149889 |
| 8 | 48426946216426731755940416722216940042029155625849753533402166195474237122305 |