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 | -720 |
2 | 339120 |
3 | -132039360 |
4 | 46081214640 |
5 | -14974899930720 |
6 | 4627836408778560 |
7 | -1377759164154871680 |
8 | 398508058352289409200 |
9 | -112648427646194257313040 |
10 | 31252327416307233967209120 |
11 | -8536592939398421710286859840 |
12 | 2301363255613811638678456000320 |
13 | -613491781086725734777586106900960 |