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 | -216 |
| 2 | -2592 |
| 3 | -10412064 |
| 4 | -1955812608 |
| 5 | -1193816824272 |
| 6 | -424976182312320 |
| 7 | -205525905843878208 |
| 8 | -89308328381644142592 |
| 9 | -42098146869799454214456 |
| 10 | -19580168925118916335723968 |
| 11 | -9345687920591466548039096160 |