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 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 11 |
| 7 | 41 |
| 8 | 220 |
| 9 | 1243 |
| 10 | 9368 |
| 11 | 89049 |
| 12 | 1135894 |
| 13 | 19381407 |
| 14 | 445505570 |
| 15 | 13741579905 |
| 16 | 566739127723 |
| 17 | 31124921885829 |