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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 3 |
| 9 | 8 |
| 10 | 42 |
| 11 | 185 |
| 12 | 888 |
| 13 | 5110 |
| 14 | 27436 |
| 15 | 168030 |
| 16 | 1008906 |
| 17 | 6283414 |
| 18 | 39866181 |
| 19 | 253511073 |