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 | 0 |
2 | 4 |
3 | 6 |
4 | 280 |
5 | 1620 |
6 | 67788 |
7 | 844200 |
8 | 36344992 |
9 | 752867136 |
10 | 34869857040 |
11 | 1039132179360 |
12 | 52776841318848 |
13 | 2066262237673920 |
14 | 115959403155851136 |
15 | 5617102749187849920 |
16 | 348802585405252070400 |
17 | 20063354348482794961920 |
18 | 1375625132090917881338880 |