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 | 8 |
| 2 | 16 |
| 3 | -32 |
| 4 | -96 |
| 5 | 368 |
| 6 | 960 |
| 7 | -3392 |
| 8 | -8896 |
| 9 | 31528 |
| 10 | 82656 |
| 11 | -292704 |
| 12 | -767616 |
| 13 | 2719024 |
| 14 | 7130496 |
| 15 | -25257408 |
| 16 | -66235776 |
| 17 | 234616720 |
| 18 | 615265872 |
| 19 | -2179359392 |
| 20 | -5715218752 |
| 21 | 20244124928 |
| 22 | 53088812352 |
| 23 | -188048196544 |
| 24 | -493143336192 |
| 25 | 1746784492472 |
| 26 | 4580821023328 |
| 27 | -16225925666624 |