n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 1 |
3 | 0 |
4 | 2 |
5 | 6 |
6 | 15 |
7 | 46 |
8 | 132 |
9 | 380 |
10 | 1101 |
11 | 3180 |
12 | 9190 |
13 | 26562 |
14 | 76763 |
15 | 221850 |
16 | 641160 |
17 | 1852984 |
18 | 5355225 |
19 | 15476888 |
20 | 44729034 |
21 | 129269310 |
22 | 373595239 |
23 | 1079710278 |
24 | 3120420620 |
25 | 9018182964 |
26 | 26063032485 |
27 | 75323561860 |
28 | 217689133998 |
29 | 629133273722 |
30 | 1818228906675 |
31 | 5254779066930 |
32 | 15186593360656 |
33 | 43890069394800 |
34 | 126844654738097 |
[0,0,1,0,2,6,15,46,132,380,1101,3180,9190,26562, 76763,221850,641160,1852984,5355225,15476888, 44729034,129269310,373595239,1079710278, 3120420620,9018182964,26063032485,75323561860, 217689133998,629133273722,1818228906675, 5254779066930,15186593360656,43890069394800, 126844654738097] |