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 | 27 |
| 4 | 1048576 |
| 5 | 45916502400000 |
| 6 | 237376313799769806328950291431424 |
| 7 | 18897697257047055734419223897702400000000000000000000000000000000000 |