n | a(n) |
---|---|
0 | 1 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 4 |
6 | 10 |
7 | 20 |
8 | 36 |
9 | 60 |
10 | 104 |
11 | 180 |
12 | 336 |
13 | 620 |
14 | 1174 |
15 | 2160 |
16 | 3961 |
17 | 7100 |
18 | 12690 |
19 | 22424 |
20 | 39651 |
21 | 69820 |
22 | 122970 |
23 | 215904 |
24 | 378470 |
25 | 660872 |
26 | 1150740 |
27 | 1996200 |
28 | 3452685 |
29 | 5952916 |
30 | 10237576 |
31 | 17559460 |
32 | 30049285 |
33 | 51301020 |
34 | 87390872 |
35 | 148534232 |
36 | 251916041 |
37 | 426329040 |
38 | 720003646 |
39 | 1213481344 |
40 | 2041155052 |
41 | 3426721080 |
[1,0,0,0,1,4,10,20,36,60,104,180,336,620,1174, 2160,3961,7100,12690,22424,39651,69820,122970, 215904,378470,660872,1150740,1996200,3452685, 5952916,10237576,17559460,30049285,51301020, 87390872,148534232,251916041,426329040,720003646, 1213481344,2041155052,3426721080] |