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 | 256 |
| 3 | 28672 |
| 4 | 51380224 |
| 5 | 161128382464 |
| 6 | 8084777718513664 |
| 7 | 709908161907247808512 |
| 8 | 997369854092025849117147136 |
| 9 | 2452157460147152961259796760100864 |