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) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 3 |
5 | -6 |
6 | 32 |
7 | 264 |
8 | -2024 |
9 | 2400 |
10 | 3420 |
11 | 55800 |
12 | -666540 |
13 | 909720 |
14 | 2570400 |
15 | 90440 |
16 | 13101144 |
17 | 72406040 |
18 | -3757930680 |
19 | 13117344800 |
20 | 72965762016 |
21 | -261763004160 |