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 | 61 |
| 4 | 421 |
| 5 | 211082 |
| 6 | 11238341 |
| 7 | 16788951482 |
| 8 | 41126483642 |