n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 1 |
6 | 5 |
7 | 9 |
8 | 29 |
9 | 62 |
10 | 181 |
11 | 422 |
12 | 1166 |
13 | 2885 |
14 | 7788 |
15 | 19893 |
16 | 53319 |
17 | 138931 |
18 | 372027 |
19 | 982379 |
20 | 2635898 |
21 | 7026483 |
22 | 18914903 |
23 | 50781803 |
24 | 137201419 |
25 | 370442111 |
26 | 1004512375 |
27 | 2724867782 |
28 | 7414635185 |
29 | 20193165834 |
30 | 55125632502 |
[0,0,0,1,1,5,9,29,62,181,422,1166,2885,7788,19893, 53319,138931,372027,982379,2635898,7026483, 18914903,50781803,137201419,370442111,1004512375, 2724867782,7414635185,20193165834,55125632502] |