n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 0 |
3 | 0 |
4 | 0 |
5 | 15 |
6 | 110 |
7 | 455 |
8 | 1400 |
9 | 3570 |
10 | 7980 |
11 | 16170 |
12 | 30360 |
13 | 53625 |
14 | 90090 |
15 | 145145 |
16 | 225680 |
17 | 340340 |
18 | 499800 |
19 | 717060 |
20 | 1007760 |
21 | 1390515 |
22 | 1887270 |
23 | 2523675 |
24 | 3329480 |
25 | 4338950 |
26 | 5591300 |
27 | 7131150 |
28 | 9009000 |
29 | 11281725 |
30 | 14013090 |
31 | 17274285 |
32 | 21144480 |
[0,0,0,0,0,15,110,455,1400,3570,7980,16170,30360, 53625,90090,145145,225680,340340,499800,717060, 1007760,1390515,1887270,2523675,3329480,4338950, 5591300,7131150,9009000,11281725,14013090, 17274285,21144480] |