n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 28 |
4 | 256 |
5 | 2704 |
6 | 31168 |
7 | 380608 |
8 | 4840960 |
9 | 63458560 |
10 | 851399680 |
11 | 11635096576 |
12 | 161396604928 |
13 | 2266669453312 |
14 | 32166082822144 |
15 | 460531091685376 |
16 | 6644185553305600 |
17 | 96498260064403456 |
18 | 1409750653282287616 |
[1,1,4,28,256,2704,31168,380608,4840960,63458560, 851399680,11635096576,161396604928,2266669453312, 32166082822144,460531091685376,6644185553305600, 96498260064403456,1409750653282287616] |