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 | 0 |
3 | 1 |
4 | 6 |
5 | 35 |
6 | 275 |
7 | 2884 |
8 | 35672 |
9 | 494724 |
10 | 7673670 |
11 | 132896676 |
12 | 2544253426 |
13 | 53252983992 |
14 | 1208888367596 |
15 | 29592833903424 |
16 | 777311220788320 |
17 | 21808542026480120 |
18 | 650880782773059840 |
19 | 20590135175285212800 |
20 | 688212821908314587880 |
21 | 24235789570607605377680 |