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 | 124499 |
| 2 | 1244990 |
| 3 | 12449900 |
| 4 | 124499000 |
| 5 | 594959999 |
| 6 | 1244990000 |
| 7 | 1349969999 |
| 8 | 5949599990 |
| 9 | 12449900000 |
| 10 | 13499699990 |
| 11 | 59495999900 |