A067004 - cp's OEIS frontend

A067004 Number of numbers <= n with same number of divisors as n.

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

[1, 1, 2, 1, 3, 1, 4, 2, 2, 3, 5, 1, 6, 4, 5, 1, 7, 2, 8, 3, 6, 7, 9, 1, 3, 8, 9, 4, 10, 2, 11, 5, 10, 11, 12, 1, 12, 13, 14, 3, 13, 4, 14, 6, 7, 15, 15, 1, 4, 8, 16, 9, 16, 5, 17, 6, 18, 19, 17, 1, 18, 20, 10, 1, 21, 7, 19, 11, 22, 8, 20, 2, 21, 23, 12, 13, 24, 9, 22, 2, 2, 25, 23, 3, 26, 27]

cp's OEIS Frontend

A067004 Number of numbers <= n with same number of divisors as n.

Table of values

List of values

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

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

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