n | a(n) |
---|---|
2 | 4 |
3 | 16 |
4 | 106 |
5 | 1156 |
6 | 15016 |
7 | 255256 |
8 | 4849846 |
9 | 111546436 |
10 | 3234846616 |
11 | 100280245066 |
12 | 3710369067406 |
13 | 152125131763606 |
14 | 6541380665835016 |
15 | 307444891294245706 |
16 | 16294579238595022366 |
17 | 961380175077106319536 |
18 | 58644190679703485491636 |
[4,16,106,1156,15016,255256,4849846,111546436, 3234846616,100280245066,3710369067406, 152125131763606,6541380665835016, 307444891294245706,16294579238595022366, 961380175077106319536,58644190679703485491636] |