n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 4 |
6 | 6 |
7 | 8 |
8 | 24 |
9 | 55 |
10 | 122 |
11 | 284 |
12 | 640 |
13 | 1499 |
14 | 3523 |
15 | 8555 |
16 | 21207 |
17 | 52142 |
18 | 131769 |
19 | 340170 |
20 | 873080 |
21 | 2262490 |
22 | 5947043 |
23 | 15649920 |
24 | 41289048 |
25 | 109539183 |
26 | 291179345 |
27 | 774884877 |
28 | 2066087278 |
29 | 5516257587 |
30 | 14741851755 |
31 | 39438287815 |
[0,0,4,6,8,24,55,122,284,640,1499,3523,8555,21207, 52142,131769,340170,873080,2262490,5947043, 15649920,41289048,109539183,291179345,774884877, 2066087278,5516257587,14741851755,39438287815] |