A221273 - OEIS

A221273 as a simple table

n	a(n)
1	0
2	0
3	0
4	0
5	6
6	0
7	1
8	16
9	16
10	1
11	0
12	52
13	0
14	52
15	0
16	0
17	174
18	596
19	596
20	174
21	0
22	0
23	588
24	0
25	7252
26	0
27	588
28	0
29	1
30	1984
31	24366
32	94659
33	94659
34	24366
35	1984
36	1
37	0
38	6688
39	0
40	1250015
41	0
42	1250015
43	0
44	6688
45	0
46	0
47	22536
48	1001855
49	16474842
50	64221682
51	64221682
52	16474842
53	1001855

[0,0,0,0,6,0,1,16,16,1,0,52,0,52,0,0,174,596,596, 174,0,0,588,0,7252,0,588,0,1,1984,24366,94659, 94659,24366,1984,1,0,6688,0,1250015,0,1250015,0, 6688,0,0,22536,1001855,16474842,64221682,64221682, 16474842,1001855]