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 | 22 |
| 3 | 333 |
| 4 | 424 |
| 5 | 864 |
| 6 | 3663 |
| 7 | 4444 |
| 8 | 6336 |
| 9 | 39993 |
| 10 | 46664 |
| 11 | 48484 |
| 12 | 55555 |
| 13 | 64646 |
| 14 | 66366 |
| 15 | 84448 |
| 16 | 88288 |
| 17 | 93939 |
| 18 | 362436 |
| 19 | 488884 |
| 20 | 666666 |
| 21 | 848848 |
| 22 | 884488 |
| 23 | 6699966 |
| 24 | 6886886 |
| 25 | 6969696 |
| 26 | 7777777 |
| 27 | 8686868 |
| 28 | 8866688 |
| 29 | 8884888 |
| 30 | 9669669 |
| 31 | 9993999 |
| 32 | 18181818 |
| 33 | 26666664 |
| 34 | 36484836 |