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 | 50 |
| 2 | 1042 |
| 3 | -93700 |
| 4 | -9242708 |
| 5 | 84323000 |
| 6 | 71595491320 |
| 7 | 2842116962000 |
| 8 | -588597736311920 |
| 9 | -62580339060364000 |
| 10 | 4594562542866814240 |
| 11 | 1142149470643447832000 |
| 12 | -16580120530325575181120 |
| 13 | -20812053164894042027728000 |
| 14 | -726343053712911149403451520 |