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 | 30 |
| 2 | -415 |
| 3 | 3514 |
| 4 | -20386 |
| 5 | 85924 |
| 6 | -272198 |
| 7 | 661180 |
| 8 | -1244717 |
| 9 | 1822478 |
| 10 | -2068955 |
| 11 | 1802474 |
| 12 | -1181760 |
| 13 | 563888 |
| 14 | -184752 |
| 15 | 37152 |
| 16 | -3456 |