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 | 0 |
| 1 | 1 |
| 2 | 65600 |
| 3 | 64571175 |
| 4 | 8589942784 |
| 5 | 381469765625 |
| 6 | 8463329862336 |
| 7 | 116315257405375 |
| 8 | 1125899907891200 |
| 9 | 8338590852224769 |
| 10 | 50000000005000000 |
| 11 | 252723514259390471 |
| 12 | 1109305553388134400 |
| 13 | 4325207959722043225 |