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) |
|---|---|
| 3 | 1 |
| 4 | 23 |
| 5 | 159 |
| 6 | 649 |
| 7 | 2424 |
| 8 | 9574 |
| 9 | 39913 |
| 10 | 166639 |
| 11 | 678898 |