A285999 - cp's OEIS frontend

A285999 Total number of odd divisors of all positive integers <= n, minus the total number of middle divisors of all positive integers <= n.

n	a(n)
1	0
2	0
3	2
4	2
5	4
6	4
7	6
8	6
9	8
10	10
11	12
12	12
13	14
14	16
15	18
16	18
17	20
18	22
19	24
20	24
21	28
22	30
23	32
24	32
25	34
26	36
27	40
28	40
29	42
30	44
31	46
32	46
33	50
34	52
35	54
36	56
37	58
38	60
39	64
40	64
41	66
42	68
43	70
44	72
45	76
46	78
47	80
48	80
49	82
50	84
51	88
52	90
53	92
54	94
55	98
56	98
57	102
58	104
59	106
60	108
61	110
62	112
63	116
64	116
65	120
66	122
67	124
68	126
69	130
70	132
71	134
72	134
73	136
74	138
75	144
76	146
77	148
78	152

[0, 0, 2, 2, 4, 4, 6, 6, 8, 10, 12, 12, 14, 16, 18, 18, 20, 22, 24, 24, 28, 30, 32, 32, 34, 36, 40, 40, 42, 44, 46, 46, 50, 52, 54, 56, 58, 60, 64, 64, 66, 68, 70, 72, 76, 78, 80, 80, 82, 84, 88, 90, 92, 94, 98, 98, 102, 104, 106, 108, 110, 112, 116, 116, 120, 122, 124, 126, 130, 132, 134, 134, 136, 138, 144, 146, 148, 152]

cp's OEIS Frontend

A285999 Total number of odd divisors of all positive integers <= n, minus the total number of middle divisors of all positive integers <= n.

Table of values

List of values

n	a(n)
1	0
2	0
3	2
4	2
5	4
6	4
7	6
8	6
9	8
10	10
11	12
12	12
13	14
14	16
15	18
16	18
17	20
18	22
19	24
20	24
21	28
22	30
23	32
24	32
25	34
26	36
27	40
28	40
29	42
30	44
31	46
32	46
33	50
34	52
35	54
36	56
37	58
38	60
39	64
40	64
41	66
42	68
43	70
44	72
45	76
46	78
47	80
48	80
49	82
50	84
51	88
52	90
53	92
54	94
55	98
56	98
57	102
58	104
59	106
60	108
61	110
62	112
63	116
64	116
65	120
66	122
67	124
68	126
69	130
70	132
71	134
72	134
73	136
74	138
75	144
76	146
77	148
78	152

n	a(n)
1	0
2	0
3	2
4	2
5	4
6	4
7	6
8	6
9	8
10	10
11	12
12	12
13	14
14	16
15	18
16	18
17	20
18	22
19	24
20	24
21	28
22	30
23	32
24	32
25	34
26	36
27	40
28	40
29	42
30	44
31	46
32	46
33	50
34	52
35	54
36	56
37	58
38	60
39	64
40	64
41	66
42	68
43	70
44	72
45	76
46	78
47	80
48	80
49	82
50	84
51	88
52	90
53	92
54	94
55	98
56	98
57	102
58	104
59	106
60	108
61	110
62	112
63	116
64	116
65	120
66	122
67	124
68	126
69	130
70	132
71	134
72	134
73	136
74	138
75	144
76	146
77	148
78	152

n	a(n)
1	0
2	0
3	2
4	2
5	4
6	4
7	6
8	6
9	8
10	10
11	12
12	12
13	14
14	16
15	18
16	18
17	20
18	22
19	24
20	24
21	28
22	30
23	32
24	32
25	34
26	36
27	40
28	40
29	42
30	44
31	46
32	46
33	50
34	52
35	54
36	56
37	58
38	60
39	64
40	64
41	66
42	68
43	70
44	72
45	76
46	78
47	80
48	80
49	82
50	84
51	88
52	90
53	92
54	94
55	98
56	98
57	102
58	104
59	106
60	108
61	110
62	112
63	116
64	116
65	120
66	122
67	124
68	126
69	130
70	132
71	134
72	134
73	136
74	138
75	144
76	146
77	148
78	152