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) |
|---|---|
| 7 | 1 |
| 8 | 5 |
| 9 | 24 |
| 10 | 109 |
| 11 | 465 |
| 12 | 1943 |
| 13 | 7827 |
| 14 | 31095 |
| 15 | 121356 |
| 16 | 469235 |
| 17 | 1797376 |
| 18 | 6844290 |
| 19 | 25928036 |