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 | 136 |
5 | 660 |
6 | 13668 |
7 | 128520 |
8 | 2846240 |
9 | 41368320 |
10 | 1021615920 |
11 | 20260896480 |
12 | 564541372800 |
13 | 14159468157120 |
14 | 445236762450816 |
15 | 13446791658256320 |
16 | 474901138629918720 |
17 | 16708336544212992000 |
18 | 658279512232521209856 |
19 | 26360704394322974161920 |
20 | 1150065728368040063784960 |