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) |
|---|---|
| 0 | 2 |
| 1 | 19 |
| 2 | 83 |
| 3 | 89 |
| 4 | 809 |
| 5 | 1889 |
| 6 | 4889 |
| 7 | 46889 |
| 8 | 48889 |
| 9 | 468889 |
| 10 | 688889 |
| 11 | 3888889 |
| 12 | 4888889 |
| 13 | 28888889 |
| 14 | 88884889 |
| 15 | 288888889 |
| 16 | 808888889 |
| 17 | 4488888889 |
| 18 | 8688888889 |
| 19 | 48808888889 |
| 20 | 48888888889 |
| 21 | 288888888889 |
| 22 | 888088888889 |
| 23 | 1888888888889 |
| 24 | 4888888888889 |
| 25 | 48808888888889 |
| 26 | 88848888888889 |