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 | 1 |
| 5 | 2 |
| 6 | 5 |
| 7 | 9 |
| 8 | 22 |
| 9 | 62 |
| 10 | 177 |
| 11 | 560 |
| 12 | 1939 |
| 13 | 7067 |
| 14 | 27331 |
| 15 | 110871 |
| 16 | 468684 |
| 17 | 2057161 |
| 18 | 9341736 |