A385625 - cp's OEIS frontend

A385625 Sum of the divisors d of n with an odd number of primes not exceeding d.

n	a(n)
1	0
2	2
3	0
4	2
5	5
6	8
7	0
8	2
9	0
10	7
11	11
12	20
13	0
14	2
15	5
16	2
17	17
18	26
19	0
20	7
21	0
22	13
23	23
24	44
25	30
26	28
27	27
28	30
29	0
30	13
31	31
32	34
33	44
34	53
35	40
36	74
37	0
38	2
39	0
40	7
41	41
42	50
43	0
44	13
45	5
46	25
47	47
48	92
49	49
50	82
51	68
52	80
53	0
54	53
55	16
56	30
57	0
58	2
59	59
60	85
61	0
62	33
63	0
64	34
65	5
66	52
67	67
68	121
69	92
70	112
71	0
72	98
73	73
74	76
75	105
76	78
77	88
78	112
79	0
80	7
81	27
82	43
83	83
84	174
85	107
86	88
87	87
88	101
89	0
90	31
91	0
92	25
93	31
94	49
95	5
96	124
97	97
98	149

[0, 2, 0, 2, 5, 8, 0, 2, 0, 7, 11, 20, 0, 2, 5, 2, 17, 26, 0, 7, 0, 13, 23, 44, 30, 28, 27, 30, 0, 13, 31, 34, 44, 53, 40, 74, 0, 2, 0, 7, 41, 50, 0, 13, 5, 25, 47, 92, 49, 82, 68, 80, 0, 53, 16, 30, 0, 2, 59, 85, 0, 33, 0, 34, 5, 52, 67, 121, 92, 112, 0, 98, 73, 76, 105, 78, 88, 112, 0, 7, 27, 43, 83, 174, 107, 88, 87, 101, 0, 31, 0, 25, 31, 49, 5, 124, 97, 149]

cp's OEIS Frontend

A385625 Sum of the divisors d of n with an odd number of primes not exceeding d.

Table of values

List of values

n	a(n)
1	0
2	2
3	0
4	2
5	5
6	8
7	0
8	2
9	0
10	7
11	11
12	20
13	0
14	2
15	5
16	2
17	17
18	26
19	0
20	7
21	0
22	13
23	23
24	44
25	30
26	28
27	27
28	30
29	0
30	13
31	31
32	34
33	44
34	53
35	40
36	74
37	0
38	2
39	0
40	7
41	41
42	50
43	0
44	13
45	5
46	25
47	47
48	92
49	49
50	82
51	68
52	80
53	0
54	53
55	16
56	30
57	0
58	2
59	59
60	85
61	0
62	33
63	0
64	34
65	5
66	52
67	67
68	121
69	92
70	112
71	0
72	98
73	73
74	76
75	105
76	78
77	88
78	112
79	0
80	7
81	27
82	43
83	83
84	174
85	107
86	88
87	87
88	101
89	0
90	31
91	0
92	25
93	31
94	49
95	5
96	124
97	97
98	149

n	a(n)
1	0
2	2
3	0
4	2
5	5
6	8
7	0
8	2
9	0
10	7
11	11
12	20
13	0
14	2
15	5
16	2
17	17
18	26
19	0
20	7
21	0
22	13
23	23
24	44
25	30
26	28
27	27
28	30
29	0
30	13
31	31
32	34
33	44
34	53
35	40
36	74
37	0
38	2
39	0
40	7
41	41
42	50
43	0
44	13
45	5
46	25
47	47
48	92
49	49
50	82
51	68
52	80
53	0
54	53
55	16
56	30
57	0
58	2
59	59
60	85
61	0
62	33
63	0
64	34
65	5
66	52
67	67
68	121
69	92
70	112
71	0
72	98
73	73
74	76
75	105
76	78
77	88
78	112
79	0
80	7
81	27
82	43
83	83
84	174
85	107
86	88
87	87
88	101
89	0
90	31
91	0
92	25
93	31
94	49
95	5
96	124
97	97
98	149

n	a(n)
1	0
2	2
3	0
4	2
5	5
6	8
7	0
8	2
9	0
10	7
11	11
12	20
13	0
14	2
15	5
16	2
17	17
18	26
19	0
20	7
21	0
22	13
23	23
24	44
25	30
26	28
27	27
28	30
29	0
30	13
31	31
32	34
33	44
34	53
35	40
36	74
37	0
38	2
39	0
40	7
41	41
42	50
43	0
44	13
45	5
46	25
47	47
48	92
49	49
50	82
51	68
52	80
53	0
54	53
55	16
56	30
57	0
58	2
59	59
60	85
61	0
62	33
63	0
64	34
65	5
66	52
67	67
68	121
69	92
70	112
71	0
72	98
73	73
74	76
75	105
76	78
77	88
78	112
79	0
80	7
81	27
82	43
83	83
84	174
85	107
86	88
87	87
88	101
89	0
90	31
91	0
92	25
93	31
94	49
95	5
96	124
97	97
98	149