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) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 13824 |
| 3 | 268738560000 |
| 4 | 106562062388507443200000 |
| 5 | 2283380023591730815784976384000000000000 |
| 6 | 5785737804304645733190746102656048717392091545600000000000000 |