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 | 1 |
| 2 | 10 |
| 3 | 11 |
| 4 | 13 |
| 5 | 14 |
| 6 | 15 |
| 7 | 18 |
| 8 | 39 |
| 9 | 59 |
| 10 | 99 |
| 11 | 106 |
| 12 | 107 |
| 13 | 147 |
| 14 | 189 |
| 15 | 999 |
| 16 | 1049 |
| 17 | 1059 |
| 18 | 1199 |
| 19 | 1399 |
| 20 | 1599 |
| 21 | 2999 |
| 22 | 10669 |
| 23 | 10679 |
| 24 | 11789 |
| 25 | 12799 |
| 26 | 12899 |
| 27 | 16779 |
| 28 | 17899 |
| 29 | 18899 |