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 | 14 |
| 2 | -1262 |
| 3 | -58492 |
| 4 | 4701100 |
| 5 | 406940744 |
| 6 | -28573848584 |
| 7 | -3959951508688 |
| 8 | 236185377526672 |
| 9 | 49495469682710240 |
| 10 | -2406287948347046624 |
| 11 | -755331979250773951936 |
| 12 | 28017398406079098428608 |
| 13 | 13607531886656648441072768 |
| 14 | -340536322975630153440817280 |