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 | 1 |
| 2 | 7 |
| 3 | 19 |
| 4 | 67 |
| 5 | 124499 |
| 6 | 594959999 |
| 7 | 1349969999 |
| 8 | 57999659949 |
| 9 | 84936699999 |
| 10 | 498998999999 |