n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 16 |
5 | 46 |
6 | 155 |
7 | 501 |
8 | 1686 |
9 | 5991 |
10 | 21017 |
11 | 76040 |
12 | 280654 |
13 | 1035640 |
14 | 3896052 |
15 | 14780804 |
16 | 56362934 |
17 | 217403028 |
18 | 842891300 |
19 | 3286540585 |
20 | 12904895803 |
21 | 50886586718 |
22 | 201628355072 |
23 | 802775113349 |
24 | 3207600418058 |
25 | 12866424867935 |
26 | 51798254861305 |
27 | 209156221493593 |
28 | 847252559115452 |
29 | 3441859987736618 |
[1,1,2,6,16,46,155,501,1686,5991,21017,76040, 280654,1035640,3896052,14780804,56362934, 217403028,842891300,3286540585,12904895803, 50886586718,201628355072,802775113349, 3207600418058,12866424867935,51798254861305, 209156221493593,847252559115452,3441859987736618] |