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) |
---|---|
9 | 1 |
10 | 90 |
11 | 4950 |
12 | 217800 |
13 | 8494200 |
14 | 309188880 |
15 | 10821610800 |
16 | 371026656000 |
17 | 12614906304000 |
18 | 428906814336000 |
19 | 14668613050291200 |
20 | 506733905373696000 |
21 | 17735686688079360000 |
22 | 630299019222512640000 |
23 | 22780807409042242560000 |