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 | 4 |
| 2 | 16 |
| 3 | 64 |
| 4 | 736 |
| 5 | 11584 |
| 6 | 43072 |
| 7 | -607232 |
| 8 | 50435584 |
| 9 | 1204185088 |
| 10 | -38340475904 |
| 11 | -563767881728 |
| 12 | 73927460466688 |
| 13 | 311178505633792 |
| 14 | -151984023599341568 |