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 | 24 |
| 2 | 238 |
| 3 | -10512 |
| 4 | -493620 |
| 5 | 2365344 |
| 6 | 890986056 |
| 7 | 16586747712 |
| 8 | -1709991063408 |
| 9 | -85890351335040 |
| 10 | 3140424382846176 |
| 11 | 365679572700743424 |
| 12 | -2899788110604240192 |
| 13 | -1552791261528717092352 |
| 14 | -24525321318694178812800 |
| 15 | 6759200537905228989502464 |
| 16 | 286564191995504982328955136 |