n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 2 |
5 | 4 |
6 | 12 |
7 | 26 |
8 | 62 |
9 | 136 |
10 | 302 |
11 | 654 |
12 | 1412 |
13 | 3018 |
14 | 6422 |
15 | 13592 |
16 | 28662 |
17 | 60230 |
18 | 126212 |
19 | 263810 |
20 | 550222 |
21 | 1145352 |
22 | 2380062 |
23 | 4938078 |
24 | 10230852 |
25 | 21169114 |
26 | 43749862 |
27 | 90317816 |
28 | 186263462 |
29 | 383769046 |
30 | 790000452 |
31 | 1624890194 |
32 | 3339501662 |
33 | 6858353128 |
34 | 14075255822 |
[0,0,0,0,2,4,12,26,62,136,302,654,1412,3018,6422, 13592,28662,60230,126212,263810,550222,1145352, 2380062,4938078,10230852,21169114,43749862, 90317816,186263462,383769046,790000452,1624890194, 3339501662,6858353128,14075255822] |