A372836 - cp's OEIS frontend

A372836 a(n) is the numerator of Sum_{d|n, 1 < d < n} 1/d.

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	5
7	0
8	3
9	1
10	7
11	0
12	5
13	0
14	9
15	8
16	7
17	0
18	10
19	0
20	21
21	10
22	13
23	0
24	35
25	1
26	15
27	4
28	27
29	0
30	41
31	0
32	15
33	14
34	19
35	12
36	3
37	0
38	21
39	16
40	49
41	0
42	53
43	0
44	39
45	32
46	25
47	0
48	25
49	1
50	21
51	20
52	45
53	0
54	65
55	16
56	9
57	22
58	31
59	0
60	107
61	0
62	33
63	40
64	31
65	18
66	7
67	0
68	57
69	26
70	73
71	0
72	61
73	0
74	39
75	16
76	63
77	18
78	89
79	0
80	21

[0, 0, 0, 1, 0, 5, 0, 3, 1, 7, 0, 5, 0, 9, 8, 7, 0, 10, 0, 21, 10, 13, 0, 35, 1, 15, 4, 27, 0, 41, 0, 15, 14, 19, 12, 3, 0, 21, 16, 49, 0, 53, 0, 39, 32, 25, 0, 25, 1, 21, 20, 45, 0, 65, 16, 9, 22, 31, 0, 107, 0, 33, 40, 31, 18, 7, 0, 57, 26, 73, 0, 61, 0, 39, 16, 63, 18, 89, 0, 21]

cp's OEIS Frontend

A372836 a(n) is the numerator of Sum_{d|n, 1 < d < n} 1/d.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	5
7	0
8	3
9	1
10	7
11	0
12	5
13	0
14	9
15	8
16	7
17	0
18	10
19	0
20	21
21	10
22	13
23	0
24	35
25	1
26	15
27	4
28	27
29	0
30	41
31	0
32	15
33	14
34	19
35	12
36	3
37	0
38	21
39	16
40	49
41	0
42	53
43	0
44	39
45	32
46	25
47	0
48	25
49	1
50	21
51	20
52	45
53	0
54	65
55	16
56	9
57	22
58	31
59	0
60	107
61	0
62	33
63	40
64	31
65	18
66	7
67	0
68	57
69	26
70	73
71	0
72	61
73	0
74	39
75	16
76	63
77	18
78	89
79	0
80	21

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	5
7	0
8	3
9	1
10	7
11	0
12	5
13	0
14	9
15	8
16	7
17	0
18	10
19	0
20	21
21	10
22	13
23	0
24	35
25	1
26	15
27	4
28	27
29	0
30	41
31	0
32	15
33	14
34	19
35	12
36	3
37	0
38	21
39	16
40	49
41	0
42	53
43	0
44	39
45	32
46	25
47	0
48	25
49	1
50	21
51	20
52	45
53	0
54	65
55	16
56	9
57	22
58	31
59	0
60	107
61	0
62	33
63	40
64	31
65	18
66	7
67	0
68	57
69	26
70	73
71	0
72	61
73	0
74	39
75	16
76	63
77	18
78	89
79	0
80	21

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	5
7	0
8	3
9	1
10	7
11	0
12	5
13	0
14	9
15	8
16	7
17	0
18	10
19	0
20	21
21	10
22	13
23	0
24	35
25	1
26	15
27	4
28	27
29	0
30	41
31	0
32	15
33	14
34	19
35	12
36	3
37	0
38	21
39	16
40	49
41	0
42	53
43	0
44	39
45	32
46	25
47	0
48	25
49	1
50	21
51	20
52	45
53	0
54	65
55	16
56	9
57	22
58	31
59	0
60	107
61	0
62	33
63	40
64	31
65	18
66	7
67	0
68	57
69	26
70	73
71	0
72	61
73	0
74	39
75	16
76	63
77	18
78	89
79	0
80	21