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 | 3 |
| 2 | 300 |
| 3 | 3003 |
| 4 | 8038803003 |
| 5 | 80830838088000 |
| 6 | 8330808803003880083880 |
| 7 | 3033038080383000888388003003 |
| 8 | 8038308338833030088338388883003 |
| 9 | 830303888083308003388388830000003 |