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) |
|---|---|
| 2 | 0 |
| 3 | 3 |
| 4 | 1 |
| 5 | 9 |
| 6 | 52 |
| 7 | 283 |
| 8 | 2113 |
| 9 | 16142 |
| 10 | 145227 |
| 11 | 1359133 |
| 12 | 15000161 |
| 13 | 172888810 |
| 14 | 2217146126 |