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 | 90 |
| 2 | 9078 |
| 3 | 9900 |
| 4 | 733673 |
| 5 | 999000 |
| 6 | 88225294 |
| 7 | 99990000 |
| 8 | 8900869207 |
| 9 | 9296908811 |
| 10 | 9604060396 |
| 11 | 9999900000 |
| 12 | 326666333266 |
| 13 | 673333666733 |
| 14 | 700730927007 |
| 15 | 972603739726 |
| 16 | 999999000000 |
| 17 | 34519562953736 |
| 18 | 39737862788837 |