A168623 - OEIS

A168623 as a simple table

n	a(n)
0	1
1	1
2	1
3	1
4	18
5	1
6	1
7	27
8	27
9	1
10	1
11	36
12	54
13	36
14	1
15	1
16	45
17	90
18	90
19	45
20	1
21	1
22	54
23	135
24	180
25	135
26	54
27	1
28	1
29	63
30	189
31	315
32	315
33	189
34	63
35	1
36	1
37	72
38	252
39	504
40	630
41	504
42	252
43	72
44	1
45	1
46	81
47	324
48	756
49	1134
50	1134
51	756
52	324
53	81
54	1
55	1
56	90
57	405
58	1080
59	1890
60	2268
61	1890
62	1080
63	405
64	90
65	1

[1,1,1,1,18,1,1,27,27,1,1,36,54,36,1,1,45,90,90, 45,1,1,54,135,180,135,54,1,1,63,189,315,315,189, 63,1,1,72,252,504,630,504,252,72,1,1,81,324,756, 1134,1134,756,324,81,1,1,90,405,1080,1890,2268, 1890,1080,405,90,1]