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 | 5 |
| 3 | 9 |
| 4 | 17 |
| 5 | 57 |
| 6 | 65 |
| 7 | 897 |
| 8 | 4217 |
| 9 | 6225 |
| 10 | 152529 |
| 11 | 3648969 |
| 12 | 5570081 |