n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 1 |
5 | 1 |
6 | 1 |
7 | 1 |
8 | 1 |
9 | 8 |
10 | 36 |
11 | 120 |
12 | 330 |
13 | 792 |
14 | 1716 |
15 | 3432 |
16 | 48477 |
17 | 368797 |
18 | 2002429 |
19 | 8685469 |
20 | 31964725 |
21 | 103593205 |
22 | 303129685 |
23 | 6156709438 |
24 | 66139517554 |
25 | 498859498016 |
26 | 2961422519550 |
27 | 14715247475500 |
28 | 63593705003400 |
29 | 245316996896400 |
30 | 6498850067259615 |
[1,1,1,1,1,1,1,1,1,8,36,120,330,792,1716,3432, 48477,368797,2002429,8685469,31964725,103593205, 303129685,6156709438,66139517554,498859498016, 2961422519550,14715247475500,63593705003400, 245316996896400,6498850067259615] |