A159072 - cp's OEIS frontend

A159072 Count of numbers k in the range 1<=k<= n such that set of proper divisors of k is not a subset of the set of the proper divisors of n.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	3
8	2
9	4
10	4
11	6
12	2
13	7
14	6
15	7
16	7
17	10
18	7
19	11
20	8
21	11
22	12
23	14
24	8
25	15
26	15
27	16
28	15
29	19
30	13
31	20
32	17
33	20
34	21
35	22
36	17
37	25
38	24
39	25
40	21
41	28
42	23
43	29
44	26
45	26
46	30
47	32
48	24
49	33
50	31
51	34
52	33
53	37
54	32
55	37
56	33
57	39
58	40
59	42
60	32
61	43
62	42
63	40
64	41
65	45
66	42
67	48
68	45
69	48
70	44
71	51
72	41
73	52
74	51
75	50
76	51
77	54

[1, 1, 1, 1, 2, 1, 3, 2, 4, 4, 6, 2, 7, 6, 7, 7, 10, 7, 11, 8, 11, 12, 14, 8, 15, 15, 16, 15, 19, 13, 20, 17, 20, 21, 22, 17, 25, 24, 25, 21, 28, 23, 29, 26, 26, 30, 32, 24, 33, 31, 34, 33, 37, 32, 37, 33, 39, 40, 42, 32, 43, 42, 40, 41, 45, 42, 48, 45, 48, 44, 51, 41, 52, 51, 50, 51, 54]

cp's OEIS Frontend

A159072 Count of numbers k in the range 1<=k<= n such that set of proper divisors of k is not a subset of the set of the proper divisors of n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	3
8	2
9	4
10	4
11	6
12	2
13	7
14	6
15	7
16	7
17	10
18	7
19	11
20	8
21	11
22	12
23	14
24	8
25	15
26	15
27	16
28	15
29	19
30	13
31	20
32	17
33	20
34	21
35	22
36	17
37	25
38	24
39	25
40	21
41	28
42	23
43	29
44	26
45	26
46	30
47	32
48	24
49	33
50	31
51	34
52	33
53	37
54	32
55	37
56	33
57	39
58	40
59	42
60	32
61	43
62	42
63	40
64	41
65	45
66	42
67	48
68	45
69	48
70	44
71	51
72	41
73	52
74	51
75	50
76	51
77	54

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	3
8	2
9	4
10	4
11	6
12	2
13	7
14	6
15	7
16	7
17	10
18	7
19	11
20	8
21	11
22	12
23	14
24	8
25	15
26	15
27	16
28	15
29	19
30	13
31	20
32	17
33	20
34	21
35	22
36	17
37	25
38	24
39	25
40	21
41	28
42	23
43	29
44	26
45	26
46	30
47	32
48	24
49	33
50	31
51	34
52	33
53	37
54	32
55	37
56	33
57	39
58	40
59	42
60	32
61	43
62	42
63	40
64	41
65	45
66	42
67	48
68	45
69	48
70	44
71	51
72	41
73	52
74	51
75	50
76	51
77	54

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	3
8	2
9	4
10	4
11	6
12	2
13	7
14	6
15	7
16	7
17	10
18	7
19	11
20	8
21	11
22	12
23	14
24	8
25	15
26	15
27	16
28	15
29	19
30	13
31	20
32	17
33	20
34	21
35	22
36	17
37	25
38	24
39	25
40	21
41	28
42	23
43	29
44	26
45	26
46	30
47	32
48	24
49	33
50	31
51	34
52	33
53	37
54	32
55	37
56	33
57	39
58	40
59	42
60	32
61	43
62	42
63	40
64	41
65	45
66	42
67	48
68	45
69	48
70	44
71	51
72	41
73	52
74	51
75	50
76	51
77	54