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 | 9 |
| 2 | 81 |
| 3 | 961 |
| 4 | 9025 |
| 5 | 96721 |
| 6 | 990025 |
| 7 | 9966649 |
| 8 | 99980001 |
| 9 | 999761161 |
| 10 | 9999400009 |
| 11 | 99998250625 |
| 12 | 999946000729 |
| 13 | 9999989500176 |
| 14 | 99999960000004 |
| 15 | 999999455981824 |
| 16 | 9999998600000049 |
| 17 | 99999998724439696 |
| 18 | 999999998000000001 |