n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 0 |
4 | 2 |
5 | 1 |
6 | 6 |
7 | 7 |
8 | 26 |
9 | 43 |
10 | 135 |
11 | 276 |
12 | 755 |
13 | 1769 |
14 | 4648 |
15 | 11406 |
16 | 29762 |
17 | 75284 |
18 | 195566 |
19 | 503165 |
20 | 1310705 |
21 | 3402317 |
22 | 8892807 |
23 | 23231037 |
24 | 60906456 |
25 | 159786040 |
26 | 420144405 |
27 | 1105673058 |
28 | 2914252306 |
29 | 7688019511 |
30 | 20304253421 |
31 | 53667498236 |
32 | 141976081288 |
33 | 375858854594 |
34 | 995728192169 |
[0,1,0,2,1,6,7,26,43,135,276,755,1769,4648,11406, 29762,75284,195566,503165,1310705,3402317,8892807, 23231037,60906456,159786040,420144405,1105673058, 2914252306,7688019511,20304253421,53667498236, 141976081288,375858854594,995728192169] |