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) |
|---|---|
| 11 | 5 |
| 12 | 50 |
| 13 | 529 |
| 14 | 3870 |
| 15 | 28900 |
| 16 | 185014 |
| 17 | 1191698 |
| 18 | 7080332 |
| 19 | 42072344 |
| 20 | 238337862 |