A126132 - cp's OEIS frontend

A126132 a(n) = number of k's, 1<=k<=n, where d(k) is equal to any divisor of n, where d(k) is the number of positive divisors of k.

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

[1, 2, 1, 3, 1, 5, 1, 7, 3, 5, 1, 12, 1, 7, 3, 12, 1, 12, 1, 15, 3, 9, 1, 23, 2, 10, 4, 19, 1, 19, 1, 23, 4, 12, 2, 33, 1, 13, 4, 31, 1, 22, 1, 29, 6, 15, 1, 45, 1, 18, 5, 32, 1, 31, 2, 40, 5, 17, 1, 53, 1, 19, 6, 45, 2, 33, 1, 41, 5, 23, 1, 69, 1, 22, 6, 45, 2, 39, 1, 59, 6, 23, 1, 70, 3, 24, 5]

cp's OEIS Frontend

A126132 a(n) = number of k's, 1<=k<=n, where d(k) is equal to any divisor of n, where d(k) is the number of positive divisors of k.

Table of values

List of values

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

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

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