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 | 5 |
| 2 | 25 |
| 3 | 125 |
| 4 | 3125 |
| 5 | 53125 |
| 6 | 453125 |
| 7 | 4453125 |
| 8 | 14453125 |
| 9 | 314453125 |
| 10 | 2314453125 |
| 11 | 22314453125 |
| 12 | 122314453125 |
| 13 | 4122314453125 |
| 14 | 44122314453125 |
| 15 | 444122314453125 |
| 16 | 4444122314453125 |
| 17 | 54444122314453125 |
| 18 | 254444122314453125 |
| 19 | 1254444122314453125 |
| 20 | 21254444122314453125 |