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 | 1 |
2 | 2 |
3 | 18 |
4 | 96 |
5 | 600 |
6 | 5760 |
7 | 57960 |
8 | 645120 |
9 | 8285760 |
10 | 117936000 |
11 | 1842825600 |
12 | 31374604800 |
13 | 578334556800 |
14 | 11493004723200 |
15 | 244720360684800 |
16 | 5555523785011200 |
17 | 134002274473267200 |
18 | 3422904611167641600 |
19 | 92290617116425728000 |
20 | 2619214995575033856000 |