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 | 17 |
| 2 | 83521 |
| 3 | 118587876497 |
| 4 | 48661191875666868481 |
| 5 | 5770627412348402378939569991057 |
| 6 | 197770344305988984840145602058543169130838081 |