A165861 - OEIS

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A165861 as a simple table

n	a(n)
1	1
2	40
3	40
4	1600
5	40
6	1600
7	40
8	64000
9	1600
10	1600
11	40
12	64000
13	40
14	1600
15	1600
16	2560000
17	40
18	64000
19	40
20	64000
21	1600
22	1600
23	40
24	2560000
25	1600
26	1600
27	64000
28	64000
29	40
30	64000
31	40
32	102400000
33	1600
34	1600
35	1600
36	2560000
37	40
38	1600
39	1600
40	2560000
41	40
42	64000
43	40

[1,40,40,1600,40,1600,40,64000,1600,1600,40,64000, 40,1600,1600,2560000,40,64000,40,64000,1600,1600, 40,2560000,1600,1600,64000,64000,40,64000,40, 102400000,1600,1600,1600,2560000,40,1600,1600, 2560000,40,64000,40]