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 | 9 |
| 2 | 99 |
| 3 | 189 |
| 4 | 279 |
| 5 | 369 |
| 6 | 459 |
| 7 | 549 |
| 8 | 639 |
| 9 | 729 |
| 10 | 819 |
| 11 | 909 |
| 12 | 999 |
| 13 | 1089 |
| 14 | 1179 |
| 15 | 1269 |
| 16 | 1359 |
| 17 | 1449 |
| 18 | 1539 |
| 19 | 1629 |
| 20 | 1719 |
| 21 | 1809 |
| 22 | 1899 |
| 23 | 1989 |
| 24 | 2079 |
| 25 | 2169 |
| 26 | 2259 |
| 27 | 2349 |
| 28 | 2439 |
| 29 | 2529 |
| 30 | 2619 |
| 31 | 2709 |
| 32 | 2799 |
| 33 | 2889 |
| 34 | 2979 |
| 35 | 3069 |
| 36 | 3159 |
| 37 | 3249 |
| 38 | 3339 |
| 39 | 3429 |
| 40 | 3519 |
| 41 | 3609 |
| 42 | 3699 |
| 43 | 3789 |
| 44 | 3879 |
| 45 | 3969 |