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 | 11711 |
| 2 | 1111117 |
| 3 | 7111111 |
| 4 | 11171111 |
| 5 | 1111711111 |
| 6 | 11111111711 |
| 7 | 11711111111 |
| 8 | 1111111111117 |
| 9 | 1111117111111 |
| 10 | 7111111111111 |
| 11 | 11111111171111 |
| 12 | 11171111111111 |
| 13 | 1111111111711111 |
| 14 | 1111711111111111 |
| 15 | 11111111111111711 |
| 16 | 11111111711111111 |
| 17 | 11711111111111111 |
| 18 | 1111111111111111117 |
| 19 | 1111111111117111111 |