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 | 1 |
| 2 | 4 |
| 3 | 81 |
| 4 | 73984 |
| 5 | 347138964225 |
| 6 | 266749070875738835911704576 |
| 7 | 153420859074097275505001068428834200016791982521508695409921 |