n | a(n) |
---|---|
3 | 0 |
4 | 2 |
5 | 1 |
6 | 5 |
7 | 9 |
8 | 28 |
9 | 35 |
10 | 132 |
11 | 283 |
12 | 638 |
13 | 1401 |
14 | 3474 |
15 | 7299 |
16 | 18210 |
17 | 41961 |
18 | 103620 |
19 | 257565 |
20 | 654193 |
21 | 1653931 |
22 | 4354242 |
23 | 11252487 |
24 | 29935478 |
25 | 78691611 |
26 | 209601901 |
27 | 554402080 |
28 | 1475129148 |
29 | 3903196658 |
30 | 10360651505 |
[0,2,1,5,9,28,35,132,283,638,1401,3474,7299,18210, 41961,103620,257565,654193,1653931,4354242, 11252487,29935478,78691611,209601901,554402080, 1475129148,3903196658,10360651505] |