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 | 9 |
| 2 | 97 |
| 3 | 9601 |
| 4 | 92198401 |
| 5 | 8500545331353601 |
| 6 | 72259270930397519221389558374401 |
| 7 | 5221402235392591963136699520829303150191924374488750728808857601 |