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 | 5 |
| 1 | 3125 |
| 2 | 298023223876953125 |
| 3 | 2350988701644575015937473074444491355637331113544175043017503412556834518909454345703125 |