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 | -1 |
2 | 31 |
3 | -7322 |
4 | 7281664 |
5 | -22105862624 |
6 | 166969429228448 |
7 | -2726003940127256256 |
8 | 86768429205346333655040 |
9 | -4977000682976771751013908480 |
10 | 483455102073887625685155978412032 |
11 | -75632981854199587114694850276377296896 |
12 | 18281294958403743105166278735321854559387648 |