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 | 6 |
| 3 | 60 |
| 4 | 136 |
| 5 | 124796 |
| 6 | 3919272 |
| 7 | 18363918 |
| 8 | 153037808 |
| 9 | 965108649 |
| 10 | 3140421892 |
| 11 | 5961162423 |
| 12 | 20437804784 |