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) |
|---|---|
| 5 | 20 |
| 6 | 100 |
| 7 | 600 |
| 8 | 4244 |
| 9 | 34264 |
| 10 | 311424 |
| 11 | 3143912 |
| 12 | 34833964 |
| 13 | 420917638 |
| 14 | 5513592091 |
| 15 | 77715460917 |