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 | -34 |
| 3 | -536 |
| 4 | 2956 |
| 5 | 119024 |
| 6 | -262904 |
| 7 | -36758816 |
| 8 | -55018864 |
| 9 | 14483450944 |
| 10 | 82692292576 |
| 11 | -6910956301696 |
| 12 | -73124586123584 |
| 13 | 3854075436523264 |
| 14 | 62947282726422656 |
| 15 | -2446063674660594176 |
| 16 | -56994716743459368704 |
| 17 | 1728872072754637865984 |