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 | 60 |
| 3 | 124 |
| 4 | 1560 |
| 5 | 4686 |
| 6 | 1456 |
| 7 | 18744 |
| 8 | 585936 |
| 9 | 4882810 |
| 10 | 212784 |