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 | 25 |
| 2 | 1225 |
| 3 | 112225 |
| 4 | 11122225 |
| 5 | 1111222225 |
| 6 | 111112222225 |
| 7 | 11111122222225 |
| 8 | 1111111222222225 |
| 9 | 111111112222222225 |
| 10 | 11111111122222222225 |
| 11 | 1111111111222222222225 |
| 12 | 111111111112222222222225 |
| 13 | 11111111111122222222222225 |
| 14 | 1111111111111222222222222225 |
| 15 | 111111111111112222222222222225 |