n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 1 |
4 | 8 |
5 | 44 |
6 | 214 |
7 | 1000 |
8 | 4592 |
9 | 20888 |
10 | 94846 |
11 | 434973 |
12 | 2042836 |
13 | 9979086 |
14 | 51460622 |
15 | 283839957 |
16 | 1688139424 |
17 | 10859199656 |
18 | 75338888918 |
19 | 560740210491 |
20 | 4445766353604 |
21 | 37329808482989 |
22 | 330143634313064 |
23 | 3064464030121369 |
[0,0,1,8,44,214,1000,4592,20888,94846,434973, 2042836,9979086,51460622,283839957,1688139424, 10859199656,75338888918,560740210491, 4445766353604,37329808482989,330143634313064, 3064464030121369] |