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 | 4 |
| 2 | 100 |
| 3 | 3136 |
| 4 | 119716 |
| 5 | 5071504 |
| 6 | 230553856 |
| 7 | 11016601600 |
| 8 | 546360462244 |
| 9 | 27888242788624 |
| 10 | 1456587070867600 |
| 11 | 77515424509446400 |
| 12 | 4189899499315360000 |
| 13 | 229472379264509977600 |
| 14 | 12709952101698593689600 |
| 15 | 710863065714510068187136 |