A071983 - OEIS

A071983 as a simple table

n	a(n)
15	1
16	1
17	1
18	0
19	0
20	0
21	0
22	0
23	3
24	0
25	10
26	12
27	35
28	52
29	19
30	20
31	349
32	392
33	669
34	4041
35	17175
36	12960
37	14026
38	11889
39	29123
40	39550
41	219968
42	553694
43	2178103
44	5301127
45	12220138
46	38838893
47	68361609
48	140571720
49	280217025
50	204853870
51	738704986
52	2368147377
53	5511090791
54	9802605881
55	21164463050
56	47746712739
57	68092497615
58	123092214818

[1,1,1,0,0,0,0,0,3,0,10,12,35,52,19,20,349,392, 669,4041,17175,12960,14026,11889,29123,39550, 219968,553694,2178103,5301127,12220138,38838893, 68361609,140571720,280217025,204853870,738704986, 2368147377,5511090791,9802605881,21164463050, 47746712739,68092497615,123092214818]