n | a(n) |
---|---|
1 | 0 |
2 | 0 |
3 | 0 |
4 | 1 |
5 | 1 |
6 | 6 |
7 | 8 |
8 | 29 |
9 | 45 |
10 | 130 |
11 | 220 |
12 | 561 |
13 | 1001 |
14 | 2366 |
15 | 4368 |
16 | 9829 |
17 | 18565 |
18 | 40410 |
19 | 77540 |
20 | 164921 |
21 | 320001 |
22 | 669526 |
23 | 1309528 |
24 | 2707629 |
25 | 5326685 |
26 | 10919090 |
27 | 21572460 |
28 | 43942081 |
29 | 87087001 |
30 | 176565486 |
31 | 350739488 |
32 | 708653429 |
33 | 1410132405 |
34 | 2841788170 |
35 | 5662052980 |
[0,0,0,1,1,6,8,29,45,130,220,561,1001,2366,4368, 9829,18565,40410,77540,164921,320001,669526, 1309528,2707629,5326685,10919090,21572460, 43942081,87087001,176565486,350739488,708653429, 1410132405,2841788170,5662052980] |