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 | 44 |
5 | 360 |
6 | 4206 |
7 | 59584 |
8 | 1021432 |
9 | 20329344 |
10 | 461596090 |
11 | 11756157952 |
12 | 331835099364 |
13 | 10278341179392 |
14 | 346555737301606 |
15 | 12633922368061440 |
16 | 495139124241620080 |
17 | 20758413862397509632 |
18 | 926980786260912379122 |
19 | 43925328338613823078400 |
20 | 2201264843743619567644700 |