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 | 936 |
| 2 | 331128 |
| 3 | 52972704 |
| 4 | 3355523352 |
| 5 | 16684536816 |
| 6 | -1540796901408 |
| 7 | -39871325253312 |
| 8 | -522168659242920 |
| 9 | -4651083548616312 |
| 10 | -31647933913392432 |
| 11 | -175516717881381408 |
| 12 | -827283695234707872 |
| 13 | -3413277291552455376 |
| 14 | -12598120840018061376 |
| 15 | -42296015537631706176 |