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 | -8 |
| 2 | -16 |
| 3 | -128 |
| 4 | -1344 |
| 5 | -15872 |
| 6 | -199680 |
| 7 | -2613248 |
| 8 | -35148800 |
| 9 | -482500608 |
| 10 | -6730072064 |
| 11 | -95094702080 |
| 12 | -1358152794112 |
| 13 | -19573573681152 |
| 14 | -284284750397440 |
| 15 | -4156674357067776 |
| 16 | -61133523873169408 |
| 17 | -903754859816157184 |
| 18 | -13421680957337894912 |
| 19 | -200140704802846801920 |