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 | 5 |
| 2 | 97 |
| 3 | 991 |
| 4 | 9949 |
| 5 | 99971 |
| 6 | 999983 |
| 7 | 9999991 |
| 8 | 99999989 |
| 9 | 999999937 |
| 10 | 9999999943 |
| 11 | 99999999977 |
| 12 | 999999999989 |
| 13 | 9999999999763 |
| 14 | 99999999999959 |
| 15 | 999999999999989 |