n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 2 |
6 | 1 |
7 | 6 |
8 | 12 |
9 | 46 |
10 | 92 |
11 | 341 |
12 | 1787 |
13 | 9233 |
14 | 45752 |
15 | 285053 |
16 | 1846955 |
17 | 11977939 |
18 | 83263591 |
19 | 621012754 |
20 | 4878666808 |
21 | 39333324973 |
22 | 336376244042 |
23 | 3029242658210 |
24 | 28439272956934 |
25 | 275986683743434 |
26 | 2789712466510289 |
27 | 29363495934315694 |
[1,0,0,1,2,1,6,12,46,92,341,1787,9233,45752, 285053,1846955,11977939,83263591,621012754, 4878666808,39333324973,336376244042,3029242658210, 28439272956934,275986683743434,2789712466510289, 29363495934315694] |