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) |
|---|---|
| 6 | 1 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 10395 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 383563180 |
| 19 | 523783260 |
| 20 | 6547290750 |
| 21 | 3055402350 |
| 22 | 157964301495 |
| 23 | 14054850810 |
| 24 | 34828180582195 |
| 25 | 91670862398500 |
| 26 | 448593283888750 |
| 27 | 11612610774464700 |
| 28 | 7681370284312725 |
| 29 | 6594450798260325 |
| 30 | 179804372693675480751 |
| 31 | 11896760875264765500 |