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) |
|---|---|
| 1 | 768280320 |
| 2 | -1010949120 |
| 3 | -4719098880 |
| 4 | -1791590400 |
| 5 | 24298444800 |
| 6 | -19462947840 |
| 7 | -109685145600 |
| 8 | -3192514560 |
| 9 | 144441833472 |
| 10 | -198529367040 |
| 11 | 15778022400 |
| 12 | 159125783040 |
| 13 | 861983659008 |
| 14 | 1193361776640 |
| 15 | 1359501373440 |
| 16 | 5328357672960 |