n | a(n) |
---|---|
0 | 1 |
1 | 5 |
2 | 20 |
3 | 64 |
4 | 188 |
5 | 908 |
6 | 3768 |
7 | 15072 |
8 | 61616 |
9 | 244688 |
10 | 978644 |
11 | 3913036 |
12 | 15637312 |
13 | 62573512 |
14 | 250302340 |
15 | 1001208180 |
[1,5,20,64,188,908,3768,15072,61616,244688,978644, 3913036,15637312,62573512,250302340,1001208180] |