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 | 89 |
| 2 | 809 |
| 3 | 8009 |
| 4 | 8089 |
| 5 | 8999 |
| 6 | 80809 |
| 7 | 80909 |
| 8 | 80989 |
| 9 | 89009 |
| 10 | 89809 |
| 11 | 89899 |
| 12 | 89909 |
| 13 | 89989 |
| 14 | 90089 |
| 15 | 90989 |
| 16 | 98009 |
| 17 | 98809 |
| 18 | 98899 |
| 19 | 98909 |
| 20 | 98999 |
| 21 | 99089 |
| 22 | 99809 |
| 23 | 99989 |
| 24 | 800089 |
| 25 | 800909 |
| 26 | 800999 |
| 27 | 809909 |
| 28 | 880909 |
| 29 | 888809 |
| 30 | 888989 |
| 31 | 889909 |
| 32 | 890809 |
| 33 | 890999 |
| 34 | 898889 |
| 35 | 899009 |
| 36 | 900089 |