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 | 11 |
| 2 | 127 |
| 3 | 1123 |
| 4 | 1423 |
| 5 | 112543 |
| 6 | 1124653 |
| 7 | 1234657 |
| 8 | 112345687 |
| 9 | 1123465789 |
| 10 | 10123457689 |
| 11 | 10111123456879 |
| 12 | 1011111223457689 |
| 13 | 10111112233469857 |
| 14 | 10111111122334456879 |
| 15 | 1011111111223344557689 |
| 16 | 10111111112233445569867 |