A305444 - cp's OEIS frontend

A305444 a(n) = Product_{p is odd and prime and divisor of n} (p - 2).

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	5
8	1
9	1
10	3
11	9
12	1
13	11
14	5
15	3
16	1
17	15
18	1
19	17
20	3
21	5
22	9
23	21
24	1
25	3
26	11
27	1
28	5
29	27
30	3
31	29
32	1
33	9
34	15
35	15
36	1
37	35
38	17
39	11
40	3
41	39
42	5
43	41
44	9
45	3
46	21
47	45
48	1
49	5
50	3
51	15
52	11
53	51
54	1
55	27
56	5
57	17
58	27
59	57
60	3
61	59
62	29
63	5
64	1
65	33
66	9
67	65
68	15
69	21
70	15
71	69
72	1
73	71
74	35
75	3
76	17

[1, 1, 1, 1, 3, 1, 5, 1, 1, 3, 9, 1, 11, 5, 3, 1, 15, 1, 17, 3, 5, 9, 21, 1, 3, 11, 1, 5, 27, 3, 29, 1, 9, 15, 15, 1, 35, 17, 11, 3, 39, 5, 41, 9, 3, 21, 45, 1, 5, 3, 15, 11, 51, 1, 27, 5, 17, 27, 57, 3, 59, 29, 5, 1, 33, 9, 65, 15, 21, 15, 69, 1, 71, 35, 3, 17]

cp's OEIS Frontend

A305444 a(n) = Product_{p is odd and prime and divisor of n} (p - 2).

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	5
8	1
9	1
10	3
11	9
12	1
13	11
14	5
15	3
16	1
17	15
18	1
19	17
20	3
21	5
22	9
23	21
24	1
25	3
26	11
27	1
28	5
29	27
30	3
31	29
32	1
33	9
34	15
35	15
36	1
37	35
38	17
39	11
40	3
41	39
42	5
43	41
44	9
45	3
46	21
47	45
48	1
49	5
50	3
51	15
52	11
53	51
54	1
55	27
56	5
57	17
58	27
59	57
60	3
61	59
62	29
63	5
64	1
65	33
66	9
67	65
68	15
69	21
70	15
71	69
72	1
73	71
74	35
75	3
76	17

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	5
8	1
9	1
10	3
11	9
12	1
13	11
14	5
15	3
16	1
17	15
18	1
19	17
20	3
21	5
22	9
23	21
24	1
25	3
26	11
27	1
28	5
29	27
30	3
31	29
32	1
33	9
34	15
35	15
36	1
37	35
38	17
39	11
40	3
41	39
42	5
43	41
44	9
45	3
46	21
47	45
48	1
49	5
50	3
51	15
52	11
53	51
54	1
55	27
56	5
57	17
58	27
59	57
60	3
61	59
62	29
63	5
64	1
65	33
66	9
67	65
68	15
69	21
70	15
71	69
72	1
73	71
74	35
75	3
76	17

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	5
8	1
9	1
10	3
11	9
12	1
13	11
14	5
15	3
16	1
17	15
18	1
19	17
20	3
21	5
22	9
23	21
24	1
25	3
26	11
27	1
28	5
29	27
30	3
31	29
32	1
33	9
34	15
35	15
36	1
37	35
38	17
39	11
40	3
41	39
42	5
43	41
44	9
45	3
46	21
47	45
48	1
49	5
50	3
51	15
52	11
53	51
54	1
55	27
56	5
57	17
58	27
59	57
60	3
61	59
62	29
63	5
64	1
65	33
66	9
67	65
68	15
69	21
70	15
71	69
72	1
73	71
74	35
75	3
76	17