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 | 3 |
| 3 | 7 |
| 4 | 39 |
| 5 | 63 |
| 6 | 523 |
| 7 | 4983 |
| 8 | 25007 |
| 9 | 892217 |
| 10 | 1142775 |
| 11 | 1381311 |
| 12 | 1751751 |