A337557 - cp's OEIS frontend

A337557 Number of integers less than n with the same number of odd divisors as n.

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

[0, 1, 0, 2, 1, 2, 3, 3, 0, 4, 5, 6, 7, 8, 0, 4, 9, 1, 10, 11, 1, 12, 13, 14, 2, 15, 2, 16, 17, 3, 18, 5, 4, 19, 5, 3, 20, 21, 6, 22, 23, 7, 24, 25, 0, 26, 27, 28, 4, 5, 8, 29, 30, 9, 10, 31, 11, 32, 33, 12, 34, 35, 1, 6, 13, 14, 36, 37, 15, 16, 38, 6, 39, 40, 2, 41, 17, 18, 42, 43]

cp's OEIS Frontend

A337557 Number of integers less than n with the same number of odd divisors as n.

Table of values

List of values

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

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

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