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 | 0 |
| 2 | 1089 |
| 3 | 10089 |
| 4 | 10449 |
| 5 | 10890 |
| 6 | 10899 |
| 7 | 10989 |
| 8 | 100089 |
| 9 | 100449 |
| 10 | 100890 |
| 11 | 100899 |
| 12 | 100989 |
| 13 | 102249 |
| 14 | 104490 |
| 15 | 104499 |
| 16 | 106749 |
| 17 | 107793 |
| 18 | 107892 |
| 19 | 108900 |
| 20 | 108990 |
| 21 | 108999 |
| 22 | 109890 |
| 23 | 109899 |
| 24 | 109989 |
| 25 | 1000089 |
| 26 | 1000449 |
| 27 | 1000890 |
| 28 | 1000899 |
| 29 | 1000989 |
| 30 | 1002249 |
| 31 | 1004490 |