A222666 - OEIS

A222666 as a simple table

n	a(n)
1	1
2	0
3	0
4	0
5	0
6	0
7	3
8	2
9	2
10	3
11	4
12	9
13	2
14	9
15	4
16	8
17	26
18	44
19	44
20	26
21	8
22	10
23	103
24	110
25	452
26	110
27	103
28	10
29	55
30	446
31	2686
32	4241
33	4241
34	2686
35	446
36	55
37	72
38	1964
39	7624
40	62406
41	45666
42	62406
43	7624
44	1964
45	72
46	294
47	8624
48	186400
49	1058776
50	2169240
51	2169240
52	1058776
53	186400
54	8624
55	294

[1,0,0,0,0,0,3,2,2,3,4,9,2,9,4,8,26,44,44,26,8,10, 103,110,452,110,103,10,55,446,2686,4241,4241,2686, 446,55,72,1964,7624,62406,45666,62406,7624,1964, 72,294,8624,186400,1058776,2169240,2169240, 1058776,186400,8624,294]