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 | 7 |
| 2 | 17 |
| 3 | 71 |
| 4 | 117 |
| 5 | 171 |
| 6 | 711 |
| 7 | 1117 |
| 8 | 1171 |
| 9 | 1711 |
| 10 | 7111 |
| 11 | 11117 |
| 12 | 11171 |
| 13 | 11711 |
| 14 | 17111 |
| 15 | 71111 |
| 16 | 111117 |
| 17 | 111171 |
| 18 | 111711 |
| 19 | 117111 |
| 20 | 171111 |
| 21 | 711111 |
| 22 | 1111117 |
| 23 | 1111171 |
| 24 | 1111711 |
| 25 | 1117111 |
| 26 | 1171111 |
| 27 | 1711111 |
| 28 | 7111111 |
| 29 | 11111117 |
| 30 | 11111171 |
| 31 | 11111711 |
| 32 | 11117111 |