A354433 - cp's OEIS frontend

A354433 a(n) is the denominator of the sum of the reciprocals of the nonprime divisors of n.

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

[1, 1, 1, 4, 1, 6, 1, 8, 9, 10, 1, 2, 1, 14, 15, 16, 1, 3, 1, 5, 21, 22, 1, 3, 25, 26, 27, 14, 1, 30, 1, 32, 33, 34, 35, 36, 1, 38, 39, 20, 1, 42, 1, 22, 5, 46, 1, 4, 49, 25, 51, 13, 1, 18, 55, 2, 57, 58, 1, 30, 1, 62, 63, 64, 65, 66, 1, 17, 69, 14, 1, 8, 1, 74, 25]

cp's OEIS Frontend

A354433 a(n) is the denominator of the sum of the reciprocals of the nonprime divisors of n.

Table of values

List of values

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

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

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