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 | -792 |
| 2 | -648 |
| 3 | 67840416 |
| 4 | 3219716376 |
| 5 | 16790031216 |
| 6 | -1536150710304 |
| 7 | -39898324202688 |
| 8 | -522122582192040 |
| 9 | -4650999065751096 |
| 10 | -31648313780323632 |
| 11 | -175516685804469024 |
| 12 | -827282698744164768 |
| 13 | -3413275186936731984 |
| 14 | -12598131165680789568 |
| 15 | -42296014044574387776 |