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 | 2 |
| 2 | 5 |
| 3 | 37 |
| 4 | 176401 |
| 5 | 129859329601 |
| 6 | 516625648014869290354797521879383114125823989794742396526049715541246671360001 |