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 | 4 |
1 | 15 |
2 | 66 |
3 | 306 |
4 | 1440 |
5 | 6804 |
6 | 32184 |
7 | 152280 |
8 | 720576 |
9 | 3409776 |
10 | 16135200 |
11 | 76352544 |
12 | 361304064 |
13 | 1709709120 |
14 | 8090430336 |
15 | 38284327296 |
16 | 181163381760 |
17 | 857274326784 |
18 | 4056665670144 |
19 | 19196348060160 |
20 | 90838094340096 |
21 | 429850477679616 |