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 | 7 |
| 2 | 97 |
| 3 | 983 |
| 4 | 9871 |
| 5 | 98731 |
| 6 | 987631 |
| 7 | 9876413 |
| 8 | 98765431 |
| 9 | 987654103 |