n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 1 |
8 | 1 |
9 | 1 |
10 | 2 |
11 | 5 |
12 | 15 |
13 | 64 |
14 | 342 |
15 | 2344 |
16 | 19137 |
17 | 181098 |
18 | 1922215 |
19 | 22472875 |
20 | 284556458 |
21 | 3849828695 |
22 | 54974808527 |
23 | 819865209740 |
24 | 12655913153775 |
25 | 200748351368185 |
26 | 3253193955012557 |
27 | 53619437319817482 |
28 | 895778170144927928 |
29 | 15129118461773051724 |
[0,0,0,0,0,0,1,1,1,2,5,15,64,342,2344,19137, 181098,1922215,22472875,284556458,3849828695, 54974808527,819865209740,12655913153775, 200748351368185,3253193955012557, 53619437319817482,895778170144927928, 15129118461773051724] |