n | a(n) |
---|---|
1 | 0 |
2 | 2 |
3 | 1 |
4 | 0 |
5 | 2 |
6 | 1 |
7 | 4 |
8 | 6 |
9 | 10 |
10 | 24 |
11 | 36 |
12 | 85 |
13 | 152 |
14 | 310 |
15 | 638 |
16 | 1232 |
17 | 2620 |
18 | 5194 |
19 | 10840 |
20 | 22332 |
21 | 46004 |
22 | 96528 |
23 | 199816 |
24 | 420365 |
25 | 880112 |
26 | 1851366 |
27 | 3908854 |
28 | 8245536 |
29 | 17482220 |
30 | 37049662 |
31 | 78746776 |
32 | 167602164 |
33 | 357127116 |
34 | 762506640 |
35 | 1629288824 |
36 | 3487128706 |
37 | 7470956240 |
[0,2,1,0,2,1,4,6,10,24,36,85,152,310,638,1232, 2620,5194,10840,22332,46004,96528,199816,420365, 880112,1851366,3908854,8245536,17482220,37049662, 78746776,167602164,357127116,762506640,1629288824, 3487128706,7470956240] |