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 | 7 |
| 3 | 8 |
| 4 | -22400 |
| 5 | -3821176 |
| 6 | 733375592 |
| 7 | 1324952888832 |
| 8 | 521577465629184 |
| 9 | -1322687167356985344 |
| 10 | -3493561791052460040192 |
| 11 | 83811280007607865122816 |
| 12 | 33603928402796871413168222208 |
| 13 | 112696506862115060894313558528000 |
| 14 | -389416384673353674591900391305326592 |