A252976 - OEIS

A252976 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	1
8	1
9	1
10	1
11	4
12	13
13	18
14	13
15	4
16	10
17	61
18	153
19	153
20	61
21	10
22	20
23	192
24	770
25	1236
26	770
27	192
28	20
29	35
30	483
31	2859
32	6997
33	6997
34	2859
35	483
36	35
37	56
38	1050
39	8694
40	30802
41	46812
42	30802
43	8694
44	1050
45	56
46	84
47	2058
48	22924
49	112877
50	248182
51	248182
52	112877
53	22924
54	2058

[0,0,0,0,0,0,1,1,1,1,4,13,18,13,4,10,61,153,153, 61,10,20,192,770,1236,770,192,20,35,483,2859,6997, 6997,2859,483,35,56,1050,8694,30802,46812,30802, 8694,1050,56,84,2058,22924,112877,248182,248182, 112877,22924,2058]