n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 2 |
5 | 6 |
6 | 16 |
7 | 37 |
8 | 114 |
9 | 478 |
10 | 1907 |
11 | 6777 |
12 | 28414 |
13 | 148579 |
14 | 758916 |
15 | 3580189 |
16 | 18981485 |
17 | 117883917 |
18 | 720627553 |
19 | 4193077474 |
20 | 26795418840 |
21 | 191751387094 |
22 | 1352954503595 |
23 | 9301704998742 |
24 | 69285817230370 |
25 | 559142785301527 |
26 | 4453089770243547 |
27 | 35182348161102172 |
[1,1,1,1,2,6,16,37,114,478,1907,6777,28414,148579, 758916,3580189,18981485,117883917,720627553, 4193077474,26795418840,191751387094,1352954503595, 9301704998742,69285817230370,559142785301527, 4453089770243547,35182348161102172] |