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 | 2 |
| 2 | 6 |
| 3 | 18 |
| 4 | 270 |
| 5 | 422 |
| 6 | 596 |
| 7 | 6068 |
| 8 | 42140 |
| 9 | 64178 |
| 10 | 158732 |
| 11 | 1509278 |