n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 0 |
6 | 0 |
7 | 1 |
8 | 1 |
9 | 8 |
10 | 15 |
11 | 70 |
12 | 165 |
13 | 608 |
14 | 1601 |
15 | 5259 |
16 | 14564 |
17 | 45040 |
18 | 127521 |
19 | 381691 |
20 | 1090130 |
21 | 3202382 |
22 | 9171574 |
23 | 26642413 |
24 | 76312777 |
25 | 220134939 |
26 | 629965221 |
27 | 1808975528 |
28 | 5170502225 |
29 | 14801940226 |
30 | 42257089390 |
[0,0,0,0,0,0,1,1,8,15,70,165,608,1601,5259,14564, 45040,127521,381691,1090130,3202382,9171574, 26642413,76312777,220134939,629965221,1808975528, 5170502225,14801940226,42257089390] |