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 | 89 |
| 3 | 983 |
| 4 | 9931 |
| 5 | 99991 |
| 6 | 999331 |
| 7 | 9997879 |
| 8 | 99999551 |
| 9 | 999998693 |
| 10 | 9999995363 |
| 11 | 99999976319 |
| 12 | 999999998533 |
| 13 | 9999999954787 |