n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 3 |
3 | 6 |
4 | 14 |
5 | 42 |
6 | 158 |
7 | 756 |
8 | 4594 |
9 | 35532 |
10 | 349428 |
11 | 4370436 |
12 | 69532964 |
13 | 1407280392 |
14 | 36228710348 |
15 | 1186337370456 |
16 | 49415178236344 |
17 | 2618246576596392 |
18 | 176462813970065208 |
19 | 15128228719573952976 |
20 | 1649746715671916095304 |
[1,2,3,6,14,42,158,756,4594,35532,349428,4370436, 69532964,1407280392,36228710348,1186337370456, 49415178236344,2618246576596392, 176462813970065208,15128228719573952976, 1649746715671916095304] |