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 | 3 |
2 | 15 |
3 | 60 |
4 | 252 |
5 | 1005 |
6 | 4080 |
7 | 16305 |
8 | 65460 |
9 | 261828 |
10 | 1048260 |
11 | 4192980 |
12 | 16775955 |
13 | 67103520 |
14 | 268430160 |
15 | 1073720415 |
16 | 4294945932 |
17 | 17179782540 |
18 | 68719391100 |
19 | 274877559420 |
20 | 1099511281260 |
21 | 4398045120300 |
22 | 17592184654365 |
23 | 70368738597600 |
24 | 281474971147680 |