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 | 1 |
2 | 780 |
3 | 380160 |
4 | 170537640 |
5 | 74795194705 |
6 | 32565539635200 |
7 | 14143261515284447 |
8 | 6136973985625588560 |
9 | 2662079368040434932480 |
10 | 1154617875754582889149500 |
11 | 500769437567956298239402223 |
12 | 217185579535490113365186969600 |