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 | 1 |
| 2 | 121 |
| 3 | 1444 |
| 4 | 44944 |
| 5 | 6441444 |
| 6 | 47444544 |
| 7 | 4434494464 |
| 8 | 44424414441 |
| 9 | 1113111511681 |
| 10 | 22222220262025 |
| 11 | 444431244445444 |
| 12 | 22292262226224225 |
| 13 | 441544444344443449 |
| 14 | 1113101111111117041 |
| 15 | 2222222222222640225 |
| 16 | 11111119101145491111121 |