n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 3 |
6 | 6 |
7 | 15 |
8 | 33 |
9 | 82 |
10 | 194 |
11 | 482 |
12 | 1188 |
13 | 2988 |
14 | 7528 |
15 | 19181 |
16 | 49060 |
17 | 126369 |
18 | 326863 |
19 | 849650 |
20 | 2216862 |
21 | 5806256 |
22 | 15256265 |
23 | 40210657 |
24 | 106273050 |
25 | 281593237 |
26 | 747890675 |
27 | 1990689459 |
28 | 5309397294 |
29 | 14187485959 |
30 | 37977600390 |
31 | 101827024251 |
[0,0,1,1,3,6,15,33,82,194,482,1188,2988,7528, 19181,49060,126369,326863,849650,2216862,5806256, 15256265,40210657,106273050,281593237,747890675, 1990689459,5309397294,14187485959,37977600390, 101827024251] |