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 | 1 |
| 3 | 4 |
| 4 | 36 |
| 5 | 1764 |
| 6 | 3261636 |
| 7 | 10650053687364 |
| 8 | 113423713055411194304049636 |
| 9 | 12864938683278671740537145884937248491231415124195364 |