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) |
|---|---|
| 3 | 3 |
| 4 | 43 |
| 5 | 543 |
| 6 | 6543 |
| 7 | 76543 |
| 8 | 876543 |
| 9 | 9876543 |
| 10 | 109876543 |
| 11 | 11109876543 |
| 12 | 1211109876543 |
| 13 | 131211109876543 |
| 14 | 14131211109876543 |
| 15 | 1514131211109876543 |
| 16 | 161514131211109876543 |
| 17 | 17161514131211109876543 |
| 18 | 1817161514131211109876543 |
| 19 | 191817161514131211109876543 |