n | a(n) |
---|---|
0 | 0 |
1 | 0 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 42 |
6 | 110 |
7 | 210 |
8 | 462 |
9 | 870 |
10 | 1722 |
11 | 3080 |
12 | 5852 |
13 | 10100 |
14 | 18090 |
15 | 30800 |
16 | 53130 |
17 | 87912 |
18 | 147840 |
19 | 239610 |
20 | 392502 |
21 | 626472 |
22 | 1003002 |
23 | 1573770 |
24 | 2479050 |
25 | 3831806 |
26 | 5931660 |
27 | 9057090 |
28 | 13819806 |
29 | 20834660 |
30 | 31399212 |
31 | 46806122 |
32 | 69697452 |
33 | 102870306 |
34 | 151523790 |
35 | 221488806 |
[0,0,2,6,20,42,110,210,462,870,1722,3080,5852, 10100,18090,30800,53130,87912,147840,239610, 392502,626472,1003002,1573770,2479050,3831806, 5931660,9057090,13819806,20834660,31399212, 46806122,69697452,102870306,151523790,221488806] |