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 | -1 |
| 2 | -8 |
| 3 | -73 |
| 4 | -927 |
| 5 | -13969 |
| 6 | -254580 |
| 7 | -5288596 |
| 8 | -124795126 |
| 9 | -3272571133 |
| 10 | -94692028369 |
| 11 | -2991756529687 |
| 12 | -102571647087930 |
| 13 | -3791499758414848 |
| 14 | -150359326161180392 |
| 15 | -6367668575791613601 |
| 16 | -286854342016830115157 |
| 17 | -13697147209040205869792 |