n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 0 |
3 | 2 |
4 | 6 |
5 | 6 |
6 | 14 |
7 | 60 |
8 | 120 |
9 | 216 |
10 | 732 |
11 | 2028 |
12 | 4240 |
13 | 11280 |
14 | 33696 |
15 | 83328 |
16 | 207072 |
17 | 591360 |
18 | 1606752 |
19 | 4102656 |
20 | 11172528 |
21 | 31167280 |
22 | 83112000 |
23 | 223249824 |
24 | 619860960 |
25 | 1699634784 |
26 | 4603619616 |
27 | 12689107200 |
28 | 35170240512 |
29 | 96523315200 |
30 | 265883115264 |
31 | 738668408064 |
[1,1,0,2,6,6,14,60,120,216,732,2028,4240,11280, 33696,83328,207072,591360,1606752,4102656, 11172528,31167280,83112000,223249824,619860960, 1699634784,4603619616,12689107200,35170240512, 96523315200,265883115264,738668408064] |