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 | 7744 |
| 2 | 665500 |
| 3 | 774400 |
| 4 | 5556600 |
| 5 | 6655000 |
| 6 | 7744000 |
| 7 | 55566000 |
| 8 | 66550000 |
| 9 | 77440000 |
| 10 | 447722888 |
| 11 | 448855888 |
| 12 | 555660000 |
| 13 | 665500000 |
| 14 | 774400000 |
| 15 | 1155775544 |
| 16 | 5500002244 |
| 17 | 5511005500 |
| 18 | 5556600000 |
| 19 | 6655000000 |
| 20 | 7744000000 |
| 21 | 11000004488 |
| 22 | 11122233444 |
| 23 | 22244466888 |