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) |
|---|---|
| 5 | 0 |
| 6 | 1 |
| 7 | 2 |
| 8 | 15 |
| 9 | 54 |
| 10 | 315 |
| 11 | 1715 |
| 12 | 11862 |
| 13 | 91123 |
| 14 | 847023 |