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 | 0 |
1 | 0 |
2 | 2 |
3 | 6 |
4 | 40 |
5 | 340 |
6 | 3936 |
7 | 56714 |
8 | 976704 |
9 | 19535688 |
10 | 444743680 |
11 | 11349643822 |
12 | 320813048832 |
13 | 9947821243100 |
14 | 335700998830848 |
15 | 12246806941654770 |
16 | 480247532548624384 |
17 | 20144008859005187344 |
18 | 899923326921333301248 |
19 | 42658767419625168409814 |
20 | 2138475182252830504796160 |