A372832 - cp's OEIS frontend

A372832 a(n) is the numerator of Sum_{d|n, d <= sqrt(n)} 1/d.

n	a(n)
1	1
2	1
3	1
4	3
5	1
6	3
7	1
8	3
9	4
10	3
11	1
12	11
13	1
14	3
15	4
16	7
17	1
18	11
19	1
20	7
21	4
22	3
23	1
24	25
25	6
26	3
27	4
28	7
29	1
30	61
31	1
32	7
33	4
34	3
35	6
36	9
37	1
38	3
39	4
40	39
41	1
42	2
43	1
44	7
45	23
46	3
47	1
48	9
49	8
50	17
51	4
52	7
53	1
54	2
55	6
56	53
57	4
58	3
59	1
60	49
61	1
62	3
63	31
64	15
65	6
66	2
67	1
68	7
69	4
70	129
71	1
72	19
73	1
74	3
75	23
76	7
77	8
78	2
79	1
80	83

[1, 1, 1, 3, 1, 3, 1, 3, 4, 3, 1, 11, 1, 3, 4, 7, 1, 11, 1, 7, 4, 3, 1, 25, 6, 3, 4, 7, 1, 61, 1, 7, 4, 3, 6, 9, 1, 3, 4, 39, 1, 2, 1, 7, 23, 3, 1, 9, 8, 17, 4, 7, 1, 2, 6, 53, 4, 3, 1, 49, 1, 3, 31, 15, 6, 2, 1, 7, 4, 129, 1, 19, 1, 3, 23, 7, 8, 2, 1, 83]

cp's OEIS Frontend

A372832 a(n) is the numerator of Sum_{d|n, d <= sqrt(n)} 1/d.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	3
5	1
6	3
7	1
8	3
9	4
10	3
11	1
12	11
13	1
14	3
15	4
16	7
17	1
18	11
19	1
20	7
21	4
22	3
23	1
24	25
25	6
26	3
27	4
28	7
29	1
30	61
31	1
32	7
33	4
34	3
35	6
36	9
37	1
38	3
39	4
40	39
41	1
42	2
43	1
44	7
45	23
46	3
47	1
48	9
49	8
50	17
51	4
52	7
53	1
54	2
55	6
56	53
57	4
58	3
59	1
60	49
61	1
62	3
63	31
64	15
65	6
66	2
67	1
68	7
69	4
70	129
71	1
72	19
73	1
74	3
75	23
76	7
77	8
78	2
79	1
80	83

n	a(n)
1	1
2	1
3	1
4	3
5	1
6	3
7	1
8	3
9	4
10	3
11	1
12	11
13	1
14	3
15	4
16	7
17	1
18	11
19	1
20	7
21	4
22	3
23	1
24	25
25	6
26	3
27	4
28	7
29	1
30	61
31	1
32	7
33	4
34	3
35	6
36	9
37	1
38	3
39	4
40	39
41	1
42	2
43	1
44	7
45	23
46	3
47	1
48	9
49	8
50	17
51	4
52	7
53	1
54	2
55	6
56	53
57	4
58	3
59	1
60	49
61	1
62	3
63	31
64	15
65	6
66	2
67	1
68	7
69	4
70	129
71	1
72	19
73	1
74	3
75	23
76	7
77	8
78	2
79	1
80	83

n	a(n)
1	1
2	1
3	1
4	3
5	1
6	3
7	1
8	3
9	4
10	3
11	1
12	11
13	1
14	3
15	4
16	7
17	1
18	11
19	1
20	7
21	4
22	3
23	1
24	25
25	6
26	3
27	4
28	7
29	1
30	61
31	1
32	7
33	4
34	3
35	6
36	9
37	1
38	3
39	4
40	39
41	1
42	2
43	1
44	7
45	23
46	3
47	1
48	9
49	8
50	17
51	4
52	7
53	1
54	2
55	6
56	53
57	4
58	3
59	1
60	49
61	1
62	3
63	31
64	15
65	6
66	2
67	1
68	7
69	4
70	129
71	1
72	19
73	1
74	3
75	23
76	7
77	8
78	2
79	1
80	83