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 | 2 |
| 2 | 16 |
| 3 | 896 |
| 4 | 2781184 |
| 5 | 26794772135936 |
| 6 | 2487085750646543836443049984 |
| 7 | 21427531469765285263614058238314319540132878612321796096 |