n | a(n) |
---|---|
1 | 1 |
2 | 1 |
3 | 3 |
4 | 13 |
5 | 65 |
6 | 350 |
7 | 1979 |
8 | 11612 |
9 | 70214 |
10 | 435404 |
11 | 2758687 |
12 | 17805613 |
13 | 116784864 |
14 | 776782656 |
15 | 5230553221 |
16 | 35604141425 |
17 | 244694941741 |
18 | 1696164931858 |
19 | 11847948347019 |
20 | 83333289416728 |
21 | 589804591345417 |
22 | 4198208564712140 |
23 | 30037925496641695 |
24 | 215941709087373510 |
[1,1,3,13,65,350,1979,11612,70214,435404,2758687, 17805613,116784864,776782656,5230553221, 35604141425,244694941741,1696164931858, 11847948347019,83333289416728,589804591345417, 4198208564712140,30037925496641695, 215941709087373510] |