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) |
|---|---|
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 5 |
| 8 | 12 |
| 9 | 36 |
| 10 | 99 |
| 11 | 255 |
| 12 | 614 |
| 13 | 1532 |
| 14 | 3908 |
| 15 | 10727 |
| 16 | 31242 |
| 17 | 96725 |
| 18 | 311735 |