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 | 1 |
| 3 | 9 |
| 4 | 73 |
| 5 | 333 |
| 6 | 1822 |
| 7 | 8043 |
| 8 | 28296 |
| 9 | 102042 |
| 10 | 338447 |
| 11 | 1054824 |
| 12 | 2569353 |
| 13 | 6237718 |
| 14 | 15947108 |
| 15 | 36179796 |