A165839 - OEIS

A165839 as a simple table

n	a(n)
1	1
2	18
3	18
4	324
5	18
6	324
7	18
8	5832
9	324
10	324
11	18
12	5832
13	18
14	324
15	324
16	104976
17	18
18	5832
19	18
20	5832
21	324
22	324
23	18
24	104976
25	324
26	324
27	5832
28	5832
29	18
30	5832
31	18
32	1889568
33	324
34	324
35	324
36	104976
37	18
38	324
39	324
40	104976
41	18
42	5832
43	18
44	5832
45	5832
46	324
47	18
48	1889568
49	324

[1,18,18,324,18,324,18,5832,324,324,18,5832,18, 324,324,104976,18,5832,18,5832,324,324,18,104976, 324,324,5832,5832,18,5832,18,1889568,324,324,324, 104976,18,324,324,104976,18,5832,18,5832,5832,324, 18,1889568,324]