n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 49 |
5 | 172 |
6 | 627 |
7 | 2374 |
8 | 9218 |
9 | 36536 |
10 | 147576 |
11 | 604114 |
12 | 2505636 |
13 | 10503384 |
14 | 44429132 |
15 | 189530129 |
16 | 814217984 |
17 | 3520596956 |
18 | 15311050911 |
19 | 66930619301 |
20 | 293971727765 |
21 | 1296689732244 |
22 | 5742062449808 |
23 | 25518877148421 |
24 | 113785729926120 |
25 | 508913759962817 |
26 | 2282592025746653 |
27 | 10264924766267955 |
[1,2,5,15,49,172,627,2374,9218,36536,147576, 604114,2505636,10503384,44429132,189530129, 814217984,3520596956,15311050911,66930619301, 293971727765,1296689732244,5742062449808, 25518877148421,113785729926120,508913759962817, 2282592025746653,10264924766267955] |