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 | 17 |
| 6 | 207 |
| 7 | 2278 |
| 8 | 24527 |
| 9 | 268104 |
| 10 | 3036850 |
| 11 | 36092688 |
| 12 | 453570148 |
| 13 | 6053567742 |
| 14 | 85968651558 |
| 15 | 1299069917989 |