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 | 2 |
3 | 6 |
4 | 16 |
5 | 0 |
6 | -144 |
7 | 5488 |
8 | 47104 |
9 | -2799360 |
10 | -29427200 |
11 | 3293554176 |
12 | 40830142464 |
13 | -7642645477376 |
14 | -109489995819008 |
15 | 31826754503424000 |
16 | 518027268557111296 |
17 | -221570477108873330688 |
18 | -4041287223180417957888 |
19 | 2438941389381370203996160 |
20 | 49292069262802363796684800 |