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 | 2 |
1 | 6 |
2 | 15 |
3 | 63 |
4 | 225 |
5 | 693 |
6 | 1289925 |
7 | 4455 |
8 | 34459425 |
9 | 808782975 |
10 | 5685805125 |
11 | 4106936925 |
12 | 18767808934875 |
13 | 72977109975 |
14 | 491292329653125 |
15 | 305714614450620375 |
16 | 1578522255175490625 |
17 | 33864491287501875 |
18 | 6076788748684677645496875 |
19 | 34996278233163121875 |
20 | 55478375013295336399171875 |