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 | 6 |
3 | 9 |
4 | 312 |
5 | 2070 |
6 | 53892 |
7 | 797580 |
8 | 21541440 |
9 | 508313232 |
10 | 15840608400 |
11 | 502075577520 |
12 | 18473543511552 |
13 | 722232734446080 |
14 | 31135359390952320 |
15 | 1435933667363963040 |
16 | 71392285554374384640 |
17 | 3782802775152784320000 |
18 | 213512536856209839796224 |
19 | 12767785967296083820561920 |