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 | 2 |
2 | 12 |
3 | 70 |
4 | 408 |
5 | 2378 |
6 | 13860 |
7 | 80782 |
8 | 470832 |
9 | 2744210 |
10 | 15994428 |
11 | 93222358 |
12 | 543339720 |
13 | 3166815962 |
14 | 18457556052 |
15 | 107578520350 |
16 | 627013566048 |
17 | 3654502875938 |
18 | 21300003689580 |
19 | 124145519261542 |
20 | 723573111879672 |