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 | 9 |
| 2 | 95 |
| 3 | 959 |
| 4 | 9599 |
| 5 | 95999 |
| 6 | 959999 |
| 7 | 9599999 |
| 8 | 95999987 |
| 9 | 959999879 |
| 10 | 9599998799 |
| 11 | 95999987999 |
| 12 | 959999879999 |
| 13 | 9599998791827 |
| 14 | 95999987918279 |
| 15 | 959999879182793 |
| 16 | 9599998791715333 |
| 17 | 95999987917153339 |
| 18 | 959999879171533399 |
| 19 | 9599998791715333999 |
| 20 | 95999987917153339993 |