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 | 40 |
| 2 | 760 |
| 3 | 7960 |
| 4 | 79960 |
| 5 | 799960 |
| 6 | 7999960 |
| 7 | 79999960 |
| 8 | 799999960 |
| 9 | 7999999960 |
| 10 | 79999999960 |
| 11 | 799999999960 |
| 12 | 7999999999960 |
| 13 | 79999999999960 |
| 14 | 799999999999960 |
| 15 | 7999999999999960 |
| 16 | 79999999999999960 |
| 17 | 799999999999999960 |