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 | 3984 |
7 | 57050 |
8 | 982528 |
9 | 19616328 |
10 | 446355840 |
11 | 11384327438 |
12 | 321701896704 |
13 | 9973046260060 |
14 | 336499112011776 |
15 | 12274383608508450 |
16 | 481282311712489472 |
17 | 20185816487436968208 |
18 | 901732370496365076480 |
19 | 42742176871086712813974 |
20 | 2142556308913381810012160 |