n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 0 |
8 | 0 |
9 | 0 |
10 | 0 |
11 | 0 |
12 | 0 |
13 | 2 |
14 | 4 |
15 | 6 |
16 | 9 |
17 | 42 |
18 | 231 |
19 | 1052 |
20 | 3818 |
21 | 10086 |
22 | 27892 |
23 | 90076 |
24 | 310301 |
25 | 993680 |
26 | 4663558 |
27 | 22038882 |
28 | 162588454 |
29 | 1246422151 |
30 | 8655752023 |
31 | 58951670318 |
32 | 347675502245 |
[0,0,0,0,0,0,0,0,0,0,0,0,2,4,6,9,42,231,1052,3818, 10086,27892,90076,310301,993680,4663558,22038882, 162588454,1246422151,8655752023,58951670318, 347675502245] |