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 | -1 |
2 | 1 |
3 | 0 |
4 | 3 |
5 | 4 |
6 | 20 |
7 | 50 |
8 | 189 |
9 | 588 |
10 | 2100 |
11 | 7116 |
12 | 25344 |
13 | 89298 |
14 | 321178 |
15 | 1156298 |
16 | 4206059 |
17 | 15356796 |
18 | 56424836 |
19 | 208137800 |
20 | 771229684 |
21 | 2867771004 |
22 | 10700980956 |
23 | 40050890172 |
24 | 150328400292 |
25 | 565699287186 |
26 | 2133889856550 |
27 | 8067040670100 |
28 | 30559571239890 |
29 | 115986196679730 |