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 | 2 |
| 2 | 232 |
| 3 | 16736896 |
| 4 | 18446723150919663616 |
| 5 | 1461501637330639787366751139186115801643772542976 |