n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 1 |
3 | 1 |
4 | 4 |
5 | 10 |
6 | 41 |
7 | 140 |
8 | 659 |
9 | 2885 |
10 | 14956 |
11 | 77990 |
12 | 452409 |
13 | 2678676 |
14 | 17176251 |
15 | 113458801 |
16 | 795016044 |
17 | 5760341506 |
18 | 43802563937 |
19 | 344138100628 |
20 | 2817486388739 |
21 | 23809341016525 |
22 | 208552149482436 |
23 | 1882541647472398 |
24 | 17549345518850193 |
[1,0,1,1,4,10,41,140,659,2885,14956,77990,452409, 2678676,17176251,113458801,795016044,5760341506, 43802563937,344138100628,2817486388739, 23809341016525,208552149482436,1882541647472398, 17549345518850193] |