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 | 18 |
| 2 | 108 |
| 3 | 138 |
| 4 | 198 |
| 5 | 228 |
| 6 | 348 |
| 7 | 378 |
| 8 | 618 |
| 9 | 828 |
| 10 | 858 |
| 11 | 1278 |
| 12 | 1428 |
| 13 | 1488 |
| 14 | 1608 |
| 15 | 1668 |
| 16 | 1698 |
| 17 | 1788 |
| 18 | 1878 |
| 19 | 1998 |
| 20 | 2028 |
| 21 | 2088 |
| 22 | 2238 |
| 23 | 2268 |
| 24 | 2658 |
| 25 | 2688 |
| 26 | 3168 |
| 27 | 3258 |
| 28 | 3468 |
| 29 | 3528 |
| 30 | 3558 |
| 31 | 3768 |
| 32 | 3918 |
| 33 | 4128 |
| 34 | 4158 |
| 35 | 4218 |
| 36 | 4338 |
| 37 | 4518 |
| 38 | 4548 |
| 39 | 4638 |
| 40 | 4788 |
| 41 | 4968 |
| 42 | 5418 |
| 43 | 5478 |
| 44 | 5658 |
| 45 | 5778 |