n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 22 |
4 | 130 |
5 | 807 |
6 | 5163 |
7 | 33742 |
8 | 224002 |
9 | 1505146 |
10 | 10211027 |
11 | 69814781 |
12 | 480435484 |
13 | 3324233772 |
14 | 23108532996 |
15 | 161288459289 |
[1,4,22,130,807,5163,33742,224002,1505146, 10211027,69814781,480435484,3324233772, 23108532996,161288459289] |