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) |
---|---|
4 | 1 |
5 | 20 |
6 | 360 |
7 | 6860 |
8 | 143570 |
9 | 3321864 |
10 | 84756000 |
11 | 2372001720 |
12 | 72384192540 |
13 | 2394775746220 |
14 | 85443353291296 |
15 | 3271908306712500 |
16 | 133893717061821080 |
17 | 5832748749666611920 |
18 | 269542701201588099840 |
19 | 13172225935626444660144 |
20 | 678788199609330554538000 |
21 | 36790272488566573278647940 |