A279436 - cp's OEIS frontend

A279436 Number of nonprimes less than or equal to n that do not divide n.

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	2
8	1
9	3
10	4
11	5
12	3
13	6
14	6
15	7
16	6
17	9
18	7
19	10
20	8
21	11
22	12
23	13
24	9
25	14
26	15
27	15
28	15
29	18
30	15
31	19
32	16
33	20
34	21
35	22
36	18
37	24
38	24
39	25
40	22
41	27
42	24
43	28
44	26
45	27
46	30
47	31
48	25
49	32
50	31
51	34
52	33
53	36
54	32
55	37
56	34
57	39
58	40
59	41
60	34
61	42
62	42
63	41
64	40
65	45
66	43
67	47
68	45
69	48
70	46
71	50
72	42
73	51
74	51
75	50
76	51
77	54
78	52
79	56
80	50
81	55
82	58
83	59
84	52
85	60
86	61
87	62
88	59
89	64
90	57
91	65
92	64
93	67
94	68
95	69
96	62
97	71
98	69
99	70
100	68

[0, 0, 0, 0, 1, 1, 2, 1, 3, 4, 5, 3, 6, 6, 7, 6, 9, 7, 10, 8, 11, 12, 13, 9, 14, 15, 15, 15, 18, 15, 19, 16, 20, 21, 22, 18, 24, 24, 25, 22, 27, 24, 28, 26, 27, 30, 31, 25, 32, 31, 34, 33, 36, 32, 37, 34, 39, 40, 41, 34, 42, 42, 41, 40, 45, 43, 47, 45, 48, 46, 50, 42, 51, 51, 50, 51, 54, 52, 56, 50, 55, 58, 59, 52, 60, 61, 62, 59, 64, 57, 65, 64, 67, 68, 69, 62, 71, 69, 70, 68]

cp's OEIS Frontend

A279436 Number of nonprimes less than or equal to n that do not divide n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	2
8	1
9	3
10	4
11	5
12	3
13	6
14	6
15	7
16	6
17	9
18	7
19	10
20	8
21	11
22	12
23	13
24	9
25	14
26	15
27	15
28	15
29	18
30	15
31	19
32	16
33	20
34	21
35	22
36	18
37	24
38	24
39	25
40	22
41	27
42	24
43	28
44	26
45	27
46	30
47	31
48	25
49	32
50	31
51	34
52	33
53	36
54	32
55	37
56	34
57	39
58	40
59	41
60	34
61	42
62	42
63	41
64	40
65	45
66	43
67	47
68	45
69	48
70	46
71	50
72	42
73	51
74	51
75	50
76	51
77	54
78	52
79	56
80	50
81	55
82	58
83	59
84	52
85	60
86	61
87	62
88	59
89	64
90	57
91	65
92	64
93	67
94	68
95	69
96	62
97	71
98	69
99	70
100	68

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	2
8	1
9	3
10	4
11	5
12	3
13	6
14	6
15	7
16	6
17	9
18	7
19	10
20	8
21	11
22	12
23	13
24	9
25	14
26	15
27	15
28	15
29	18
30	15
31	19
32	16
33	20
34	21
35	22
36	18
37	24
38	24
39	25
40	22
41	27
42	24
43	28
44	26
45	27
46	30
47	31
48	25
49	32
50	31
51	34
52	33
53	36
54	32
55	37
56	34
57	39
58	40
59	41
60	34
61	42
62	42
63	41
64	40
65	45
66	43
67	47
68	45
69	48
70	46
71	50
72	42
73	51
74	51
75	50
76	51
77	54
78	52
79	56
80	50
81	55
82	58
83	59
84	52
85	60
86	61
87	62
88	59
89	64
90	57
91	65
92	64
93	67
94	68
95	69
96	62
97	71
98	69
99	70
100	68

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	2
8	1
9	3
10	4
11	5
12	3
13	6
14	6
15	7
16	6
17	9
18	7
19	10
20	8
21	11
22	12
23	13
24	9
25	14
26	15
27	15
28	15
29	18
30	15
31	19
32	16
33	20
34	21
35	22
36	18
37	24
38	24
39	25
40	22
41	27
42	24
43	28
44	26
45	27
46	30
47	31
48	25
49	32
50	31
51	34
52	33
53	36
54	32
55	37
56	34
57	39
58	40
59	41
60	34
61	42
62	42
63	41
64	40
65	45
66	43
67	47
68	45
69	48
70	46
71	50
72	42
73	51
74	51
75	50
76	51
77	54
78	52
79	56
80	50
81	55
82	58
83	59
84	52
85	60
86	61
87	62
88	59
89	64
90	57
91	65
92	64
93	67
94	68
95	69
96	62
97	71
98	69
99	70
100	68