n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 16 |
5 | 110 |
6 | 435 |
7 | 1295 |
8 | 3220 |
9 | 7056 |
10 | 14070 |
11 | 26070 |
12 | 45540 |
13 | 75790 |
14 | 121121 |
15 | 187005 |
16 | 280280 |
17 | 409360 |
18 | 584460 |
19 | 817836 |
20 | 1124040 |
21 | 1520190 |
22 | 2026255 |
23 | 2665355 |
24 | 3464076 |
25 | 4452800 |
26 | 5666050 |
27 | 7142850 |
28 | 8927100 |
29 | 11067966 |
30 | 13620285 |
[0,0,0,0,16,110,435,1295,3220,7056,14070,26070, 45540,75790,121121,187005,280280,409360,584460, 817836,1124040,1520190,2026255,2665355,3464076, 4452800,5666050,7142850,8927100,11067966,13620285] |