n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 5 |
4 | 16 |
5 | 52 |
6 | 189 |
7 | 683 |
8 | 2621 |
9 | 10061 |
10 | 40031 |
11 | 159201 |
12 | 650880 |
13 | 2657089 |
14 | 11062682 |
15 | 46065143 |
16 | 194595138 |
17 | 822215099 |
18 | 3513875245 |
19 | 15021070567 |
20 | 64785349064 |
21 | 279575206629 |
22 | 1214958544538 |
23 | 5283266426743 |
24 | 23106210465665 |
25 | 101120747493793 |
26 | 444614706427665 |
[1,1,2,5,16,52,189,683,2621,10061,40031,159201, 650880,2657089,11062682,46065143,194595138, 822215099,3513875245,15021070567,64785349064, 279575206629,1214958544538,5283266426743, 23106210465665,101120747493793,444614706427665] |