A109425 - cp's OEIS frontend

A109425 Numbers k such that tau(k)/omega(k) is an integer, where tau(k) = number of divisors of k and omega(k) = number of distinct prime factors of k.

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

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

cp's OEIS Frontend

A109425 Numbers k such that tau(k)/omega(k) is an integer, where tau(k) = number of divisors of k and omega(k) = number of distinct prime factors of k.

Table of values

List of values

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

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

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