n | a(n) |
---|---|
4 | 1 |
5 | 4 |
6 | 10 |
7 | 19 |
8 | 34 |
9 | 64 |
10 | 213 |
11 | 1157 |
12 | 6478 |
13 | 33461 |
14 | 167462 |
15 | 890029 |
16 | 6064749 |
17 | 55393044 |
18 | 595987834 |
19 | 6995484146 |
20 | 87602949947 |
[1,4,10,19,34,64,213,1157,6478,33461,167462, 890029,6064749,55393044,595987834,6995484146, 87602949947] |