n | a(n) |
---|---|
3 | 0 |
4 | 0 |
5 | 4 |
6 | 4 |
7 | 8 |
8 | 30 |
9 | 50 |
10 | 99 |
11 | 270 |
12 | 665 |
13 | 1390 |
14 | 3282 |
15 | 8729 |
16 | 20828 |
17 | 50354 |
18 | 132935 |
19 | 340395 |
20 | 867459 |
21 | 2283763 |
22 | 6011749 |
23 | 15775606 |
24 | 41785059 |
25 | 111035569 |
26 | 294868281 |
27 | 784753491 |
28 | 2093244706 |
29 | 5586723163 |
30 | 14924112433 |
31 | 39928991846 |
[0,0,4,4,8,30,50,99,270,665,1390,3282,8729,20828, 50354,132935,340395,867459,2283763,6011749, 15775606,41785059,111035569,294868281,784753491, 2093244706,5586723163,14924112433,39928991846] |