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 | 49 |
| 3 | 361 |
| 4 | 3025 |
| 5 | 26569 |
| 6 | 237169 |
| 7 | 2128681 |
| 8 | 19140625 |
| 9 | 172213129 |
| 10 | 1549760689 |
| 11 | 13947373801 |
| 12 | 125524947025 |
| 13 | 1129720271689 |
| 14 | 10167469690609 |
| 15 | 91507188951721 |
| 16 | 823564585774225 |
| 17 | 7412080927594249 |
| 18 | 66708727315226929 |
| 19 | 600378542737678441 |
| 20 | 5403406875341014225 |