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) |
|---|---|
| 0 | 3 |
| 1 | 1 |
| 2 | 4 |
| 3 | 7 |
| 4 | 29 |
| 5 | 199 |
| 6 | 5778 |
| 7 | 1149851 |
| 8 | 6643838879 |
| 9 | 7639424778862807 |
| 10 | 50755107359004694554823204 |
| 11 | 387739824812222466915538827541705412334749 |
| 12 | 19679776435706023589554719270187913247121278789615838446937339578603 |