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) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 184 |
| 4 | 17488 |
| 5 | 2780752 |
| 6 | 689187720 |
| 7 | 236477490418 |
| 8 | 107317805999204 |
| 9 | 62318195302890305 |
| 10 | 45081693413563797127 |
| 11 | 39762626850034005271588 |
| 12 | 42009504510315968282400843 |
| 13 | 52381340312720286113688037624 |
| 14 | 76118747309505733406576769607755 |