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) |
|---|---|
| 1 | 1 |
| 2 | -48 |
| 3 | -195804 |
| 4 | -33552128 |
| 5 | -741989850 |
| 6 | 9398592 |
| 7 | 39080597192 |
| 8 | 3221114880 |
| 9 | -808949403027 |
| 10 | 35615512800 |
| 11 | 8419515299052 |
| 12 | 6569640870912 |
| 13 | -81651045335314 |
| 14 | -1875868665216 |
| 15 | 145284580589400 |
| 16 | 1125667983917056 |
| 17 | -2519900028948078 |