n | a(n) |
---|---|
8 | 1 |
9 | 6 |
10 | 20 |
11 | 54 |
12 | 132 |
13 | 303 |
14 | 672 |
15 | 1460 |
16 | 3120 |
17 | 6575 |
18 | 13707 |
19 | 28296 |
20 | 57938 |
21 | 117764 |
22 | 237878 |
23 | 477781 |
24 | 954910 |
25 | 1899930 |
26 | 3765054 |
27 | 7433724 |
28 | 14628436 |
29 | 28698388 |
30 | 56143591 |
31 | 109550807 |
32 | 213251179 |
33 | 414190801 |
34 | 802808056 |
35 | 1553046868 |
36 | 2998986556 |
37 | 5781366468 |
38 | 11127506290 |
[1,6,20,54,132,303,672,1460,3120,6575,13707,28296, 57938,117764,237878,477781,954910,1899930,3765054, 7433724,14628436,28698388,56143591,109550807, 213251179,414190801,802808056,1553046868, 2998986556,5781366468,11127506290] |