n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 10 |
3 | 56 |
4 | 326 |
5 | 1936 |
6 | 11644 |
7 | 70672 |
8 | 431942 |
9 | 2654816 |
10 | 16392564 |
11 | 101611536 |
12 | 631938524 |
13 | 3941350816 |
14 | 24643020344 |
15 | 154415141152 |
16 | 969445760070 |
17 | 6096812777664 |
18 | 38401653547204 |
19 | 242213348616592 |
20 | 1529642560685684 |
21 | 9671100898555168 |
22 | 61208631472013256 |
23 | 387759384222157152 |
[1,2,10,56,326,1936,11644,70672,431942,2654816, 16392564,101611536,631938524,3941350816, 24643020344,154415141152,969445760070, 6096812777664,38401653547204,242213348616592, 1529642560685684,9671100898555168, 61208631472013256,387759384222157152] |