A019117 - OEIS

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A019117 as a simple table

n	a(n)
3	0
4	0
5	5
6	4
7	4
8	24
9	44
10	86
11	230
12	499
13	1216
14	3329
15	8059
16	20320
17	54177
18	138028
19	352138
20	917367
21	2382713
22	6193160
23	16203044
24	42592581
25	112203219
26	296304327
27	785315392
28	2085553429
29	5547221211
30	14791385421

[0,0,5,4,4,24,44,86,230,499,1216,3329,8059,20320, 54177,138028,352138,917367,2382713,6193160, 16203044,42592581,112203219,296304327,785315392, 2085553429,5547221211,14791385421]