A166841 - OEIS

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A166841 as a simple table

n	a(n)
1	0
2	0
3	0
4	714
5	10101
6	67447
7	306568
8	1094952
9	3307774
10	8826726
11	21395896
12	48023298
13	101190323
14	202226037
15	386323080

[0,0,0,714,10101,67447,306568,1094952,3307774, 8826726,21395896,48023298,101190323,202226037, 386323080]