n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 2 |
4 | 2 |
5 | 8 |
6 | 14 |
7 | 36 |
8 | 74 |
9 | 168 |
10 | 358 |
11 | 780 |
12 | 1666 |
13 | 3568 |
14 | 7582 |
15 | 16084 |
16 | 33978 |
17 | 71608 |
18 | 150486 |
19 | 315548 |
20 | 660210 |
21 | 1378688 |
22 | 2873870 |
23 | 5980772 |
24 | 12427562 |
25 | 25787208 |
26 | 53438534 |
27 | 110605356 |
28 | 228667234 |
29 | 472247568 |
30 | 974321278 |
31 | 2008294900 |
32 | 4135894426 |
[0,0,2,2,8,14,36,74,168,358,780,1666,3568,7582, 16084,33978,71608,150486,315548,660210,1378688, 2873870,5980772,12427562,25787208,53438534, 110605356,228667234,472247568,974321278, 2008294900,4135894426] |