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 | 4 |
3 | 30 |
4 | 320 |
5 | 4420 |
6 | 74880 |
7 | 1502200 |
8 | 34816000 |
9 | 915267600 |
10 | 26907545600 |
11 | 874679634400 |
12 | 31150846771200 |
13 | 1206169954600000 |
14 | 50449154129920000 |
15 | 2266730426366640000 |
16 | 108883850653859840000 |
17 | 5568313898902866592000 |
18 | 302047359993635143680000 |
19 | 17321727685903810436800000 |