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 | 49 |
| 3 | 1225 |
| 4 | 4489 |
| 5 | 112225 |
| 6 | 444889 |
| 7 | 11122225 |
| 8 | 44448889 |
| 9 | 816416329 |
| 10 | 1111222225 |
| 11 | 1451229025 |
| 12 | 3832476649 |
| 13 | 4444488889 |
| 14 | 111112222225 |
| 15 | 444444888889 |
| 16 | 10185602037121 |
| 17 | 11111122222225 |
| 18 | 44444448888889 |
| 19 | 46355849271169 |
| 20 | 997230019944601 |
| 21 | 1111111222222225 |
| 22 | 1231148024622961 |