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 | 16 |
| 2 | 6400 |
| 3 | 2518569 |
| 4 | 1026177156 |
| 5 | 420771471561 |
| 6 | 172850051090025 |
| 7 | 71030642332905025 |