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) |
|---|---|
| 0 | 1123465789 |
| 1 | 203457869 |
| 2 | 103456789 |
| 3 | 1012458679 |
| 4 | 102356789 |
| 5 | 102346789 |
| 6 | 1012345987 |
| 7 | 102345689 |
| 8 | 102345697 |
| 9 | 1012356487 |