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 | -5 |
| 3 | 37 |
| 4 | -310 |
| 5 | 2795 |
| 6 | -26352 |
| 7 | 256257 |
| 8 | -2548875 |
| 9 | 25793149 |
| 10 | -264579518 |
| 11 | 2743935678 |
| 12 | -28716005918 |
| 13 | 302812817148 |
| 14 | -3213908529802 |
| 15 | 34301475340630 |
| 16 | -367873673112308 |
| 17 | 3962187547336323 |