A325459 - cp's OEIS frontend

A325459 Sum of numbers of nontrivial divisors (greater than 1 and less than k) of k for k = 1..n.

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	3
7	3
8	5
9	6
10	8
11	8
12	12
13	12
14	14
15	16
16	19
17	19
18	23
19	23
20	27
21	29
22	31
23	31
24	37
25	38
26	40
27	42
28	46
29	46
30	52
31	52
32	56
33	58
34	60
35	62
36	69
37	69
38	71
39	73
40	79
41	79
42	85
43	85
44	89
45	93
46	95
47	95
48	103
49	104
50	108
51	110
52	114
53	114
54	120
55	122
56	128
57	130
58	132
59	132
60	142

[0, 0, 0, 0, 1, 1, 3, 3, 5, 6, 8, 8, 12, 12, 14, 16, 19, 19, 23, 23, 27, 29, 31, 31, 37, 38, 40, 42, 46, 46, 52, 52, 56, 58, 60, 62, 69, 69, 71, 73, 79, 79, 85, 85, 89, 93, 95, 95, 103, 104, 108, 110, 114, 114, 120, 122, 128, 130, 132, 132, 142]

cp's OEIS Frontend

A325459 Sum of numbers of nontrivial divisors (greater than 1 and less than k) of k for k = 1..n.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	3
7	3
8	5
9	6
10	8
11	8
12	12
13	12
14	14
15	16
16	19
17	19
18	23
19	23
20	27
21	29
22	31
23	31
24	37
25	38
26	40
27	42
28	46
29	46
30	52
31	52
32	56
33	58
34	60
35	62
36	69
37	69
38	71
39	73
40	79
41	79
42	85
43	85
44	89
45	93
46	95
47	95
48	103
49	104
50	108
51	110
52	114
53	114
54	120
55	122
56	128
57	130
58	132
59	132
60	142

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	3
7	3
8	5
9	6
10	8
11	8
12	12
13	12
14	14
15	16
16	19
17	19
18	23
19	23
20	27
21	29
22	31
23	31
24	37
25	38
26	40
27	42
28	46
29	46
30	52
31	52
32	56
33	58
34	60
35	62
36	69
37	69
38	71
39	73
40	79
41	79
42	85
43	85
44	89
45	93
46	95
47	95
48	103
49	104
50	108
51	110
52	114
53	114
54	120
55	122
56	128
57	130
58	132
59	132
60	142

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	1
6	3
7	3
8	5
9	6
10	8
11	8
12	12
13	12
14	14
15	16
16	19
17	19
18	23
19	23
20	27
21	29
22	31
23	31
24	37
25	38
26	40
27	42
28	46
29	46
30	52
31	52
32	56
33	58
34	60
35	62
36	69
37	69
38	71
39	73
40	79
41	79
42	85
43	85
44	89
45	93
46	95
47	95
48	103
49	104
50	108
51	110
52	114
53	114
54	120
55	122
56	128
57	130
58	132
59	132
60	142