n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 3 |
3 | 0 |
4 | 15 |
5 | 6 |
6 | 87 |
7 | 84 |
8 | 567 |
9 | 882 |
10 | 4095 |
11 | 8448 |
12 | 32079 |
13 | 78078 |
14 | 265863 |
15 | 710892 |
16 | 2282631 |
17 | 6430794 |
18 | 20009391 |
19 | 58008216 |
20 | 177478623 |
21 | 522598230 |
22 | 1584540279 |
23 | 4705481220 |
24 | 14198074455 |
25 | 42357719586 |
26 | 127472924127 |
27 | 381253030704 |
[1,0,3,0,15,6,87,84,567,882,4095,8448,32079,78078, 265863,710892,2282631,6430794,20009391,58008216, 177478623,522598230,1584540279,4705481220, 14198074455,42357719586,127472924127,381253030704] |