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 | 4 |
| 2 | 64 |
| 3 | 324 |
| 4 | 2025 |
| 5 | 15625 |
| 6 | 102400 |
| 7 | 692224 |
| 8 | 4826809 |
| 9 | 32867289 |
| 10 | 224820036 |
| 11 | 1544804416 |
| 12 | 10578122500 |
| 13 | 72482100625 |
| 14 | 496981290961 |
| 15 | 3405885014016 |
| 16 | 23343276294144 |
| 17 | 160005726539569 |
| 18 | 1096673231227249 |
| 19 | 7516662847716100 |
| 20 | 51520374361000000 |