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 | 6 |
| 2 | 40 |
| 3 | 136 |
| 4 | 2696 |
| 5 | 3352 |
| 6 | 46976 |
| 7 | 223736 |
| 8 | 5509736 |
| 9 | 1915798072 |