A013939 - cp's OEIS frontend

A013939 Partial sums of sequence A001221 (number of distinct primes dividing n).

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	11
11	12
12	14
13	15
14	17
15	19
16	20
17	21
18	23
19	24
20	26
21	28
22	30
23	31
24	33
25	34
26	36
27	37
28	39
29	40
30	43
31	44
32	45
33	47
34	49
35	51
36	53
37	54
38	56
39	58
40	60
41	61
42	64
43	65
44	67
45	69
46	71
47	72
48	74
49	75
50	77
51	79
52	81
53	82
54	84
55	86
56	88
57	90
58	92
59	93
60	96
61	97
62	99
63	101
64	102
65	104
66	107
67	108
68	110
69	112

[0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 14, 15, 17, 19, 20, 21, 23, 24, 26, 28, 30, 31, 33, 34, 36, 37, 39, 40, 43, 44, 45, 47, 49, 51, 53, 54, 56, 58, 60, 61, 64, 65, 67, 69, 71, 72, 74, 75, 77, 79, 81, 82, 84, 86, 88, 90, 92, 93, 96, 97, 99, 101, 102, 104, 107, 108, 110, 112]

cp's OEIS Frontend

A013939 Partial sums of sequence A001221 (number of distinct primes dividing n).

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	11
11	12
12	14
13	15
14	17
15	19
16	20
17	21
18	23
19	24
20	26
21	28
22	30
23	31
24	33
25	34
26	36
27	37
28	39
29	40
30	43
31	44
32	45
33	47
34	49
35	51
36	53
37	54
38	56
39	58
40	60
41	61
42	64
43	65
44	67
45	69
46	71
47	72
48	74
49	75
50	77
51	79
52	81
53	82
54	84
55	86
56	88
57	90
58	92
59	93
60	96
61	97
62	99
63	101
64	102
65	104
66	107
67	108
68	110
69	112

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	11
11	12
12	14
13	15
14	17
15	19
16	20
17	21
18	23
19	24
20	26
21	28
22	30
23	31
24	33
25	34
26	36
27	37
28	39
29	40
30	43
31	44
32	45
33	47
34	49
35	51
36	53
37	54
38	56
39	58
40	60
41	61
42	64
43	65
44	67
45	69
46	71
47	72
48	74
49	75
50	77
51	79
52	81
53	82
54	84
55	86
56	88
57	90
58	92
59	93
60	96
61	97
62	99
63	101
64	102
65	104
66	107
67	108
68	110
69	112

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	9
10	11
11	12
12	14
13	15
14	17
15	19
16	20
17	21
18	23
19	24
20	26
21	28
22	30
23	31
24	33
25	34
26	36
27	37
28	39
29	40
30	43
31	44
32	45
33	47
34	49
35	51
36	53
37	54
38	56
39	58
40	60
41	61
42	64
43	65
44	67
45	69
46	71
47	72
48	74
49	75
50	77
51	79
52	81
53	82
54	84
55	86
56	88
57	90
58	92
59	93
60	96
61	97
62	99
63	101
64	102
65	104
66	107
67	108
68	110
69	112