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 | 0 |
| 5 | 18 |
| 6 | 79648 |
| 7 | 1568158 |
| 8 | 9251144 |
| 9 | 34765154 |
| 10 | 101461384 |
| 11 | 250731864 |
| 12 | 549801520 |
| 13 | 1100971428 |
| 14 | 2052324440 |
| 15 | 3609891704 |
| 16 | 6051280064 |