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 | 2 |
3 | 3 |
4 | 56 |
5 | 270 |
6 | 4824 |
7 | 44520 |
8 | 866816 |
9 | 12195792 |
10 | 267873120 |
11 | 5073187680 |
12 | 126754229568 |
13 | 2999710359360 |
14 | 85061489235072 |
15 | 2400155295632640 |
16 | 76724104598031360 |
17 | 2502434971473937920 |
18 | 89428428468644493312 |
19 | 3300036525511418327040 |