A172129 - OEIS

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A172129 as a simple table

n	a(n)
1	0
2	0
3	0
4	112
5	3368
6	39680
7	282248
8	1444928
9	5865552
10	20014112
11	59673360
12	159698416
13	391202680
14	890095584
15	1902427800
16	3853570560
17	7450556064
18	13829016768
19	24759442464
20	42930138864
21	72328779720
22	118747638592

[0,0,0,112,3368,39680,282248,1444928,5865552, 20014112,59673360,159698416,391202680,890095584, 1902427800,3853570560,7450556064,13829016768, 24759442464,42930138864,72328779720,118747638592]