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 | 311 |
| 2 | 733 |
| 3 | 991 |
| 4 | 1511 |
| 5 | 1811 |
| 6 | 3433 |
| 7 | 3733 |
| 8 | 7717 |
| 9 | 7757 |
| 10 | 16111 |
| 11 | 79777 |
| 12 | 99989 |
| 13 | 112111 |
| 14 | 333323 |
| 15 | 334333 |
| 16 | 733333 |
| 17 | 778777 |
| 18 | 787777 |
| 19 | 911111 |
| 20 | 999199 |
| 21 | 1171111 |
| 22 | 3733333 |
| 23 | 9999299 |
| 24 | 11131111 |
| 25 | 11911111 |