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 | 91 |
| 2 | 9079 |
| 3 | 9901 |
| 4 | 733674 |
| 5 | 999001 |
| 6 | 88225295 |
| 7 | 99990001 |
| 8 | 8900869208 |
| 9 | 9296908812 |
| 10 | 9604060397 |
| 11 | 9999900001 |
| 12 | 326666333267 |
| 13 | 673333666734 |
| 14 | 700730927008 |
| 15 | 972603739727 |
| 16 | 999999000001 |
| 17 | 34519562953737 |
| 18 | 39737862788838 |
| 19 | 49917309624956 |