A359168 - cp's OEIS frontend

A359168 Numbers k for which there is an odd number of prime factors (when counted with multiplicity) in k*sigma(k), where sigma is the sum of divisors function.

n	a(n)
1	3
2	4
3	5
4	6
5	8
6	9
7	10
8	13
9	16
10	18
11	21
12	23
13	25
14	26
15	27
16	28
17	33
18	35
19	37
20	42
21	44
22	46
23	50
24	51
25	53
26	54
27	55
28	56
29	57
30	59
31	60
32	61
33	63
34	64
35	66
36	68
37	70
38	73
39	74
40	76
41	83
42	85
43	87
44	88
45	89
46	91
47	93
48	95
49	96
50	99
51	102
52	103
53	106
54	110
55	112
56	114
57	116
58	118
59	120
60	122
61	123
62	124
63	125
64	126
65	129
66	131
67	136
68	139
69	141
70	143
71	145
72	146

[3, 4, 5, 6, 8, 9, 10, 13, 16, 18, 21, 23, 25, 26, 27, 28, 33, 35, 37, 42, 44, 46, 50, 51, 53, 54, 55, 56, 57, 59, 60, 61, 63, 64, 66, 68, 70, 73, 74, 76, 83, 85, 87, 88, 89, 91, 93, 95, 96, 99, 102, 103, 106, 110, 112, 114, 116, 118, 120, 122, 123, 124, 125, 126, 129, 131, 136, 139, 141, 143, 145, 146]

cp's OEIS Frontend

A359168 Numbers k for which there is an odd number of prime factors (when counted with multiplicity) in k*sigma(k), where sigma is the sum of divisors function.

Table of values

List of values

n	a(n)
1	3
2	4
3	5
4	6
5	8
6	9
7	10
8	13
9	16
10	18
11	21
12	23
13	25
14	26
15	27
16	28
17	33
18	35
19	37
20	42
21	44
22	46
23	50
24	51
25	53
26	54
27	55
28	56
29	57
30	59
31	60
32	61
33	63
34	64
35	66
36	68
37	70
38	73
39	74
40	76
41	83
42	85
43	87
44	88
45	89
46	91
47	93
48	95
49	96
50	99
51	102
52	103
53	106
54	110
55	112
56	114
57	116
58	118
59	120
60	122
61	123
62	124
63	125
64	126
65	129
66	131
67	136
68	139
69	141
70	143
71	145
72	146

n	a(n)
1	3
2	4
3	5
4	6
5	8
6	9
7	10
8	13
9	16
10	18
11	21
12	23
13	25
14	26
15	27
16	28
17	33
18	35
19	37
20	42
21	44
22	46
23	50
24	51
25	53
26	54
27	55
28	56
29	57
30	59
31	60
32	61
33	63
34	64
35	66
36	68
37	70
38	73
39	74
40	76
41	83
42	85
43	87
44	88
45	89
46	91
47	93
48	95
49	96
50	99
51	102
52	103
53	106
54	110
55	112
56	114
57	116
58	118
59	120
60	122
61	123
62	124
63	125
64	126
65	129
66	131
67	136
68	139
69	141
70	143
71	145
72	146

n	a(n)
1	3
2	4
3	5
4	6
5	8
6	9
7	10
8	13
9	16
10	18
11	21
12	23
13	25
14	26
15	27
16	28
17	33
18	35
19	37
20	42
21	44
22	46
23	50
24	51
25	53
26	54
27	55
28	56
29	57
30	59
31	60
32	61
33	63
34	64
35	66
36	68
37	70
38	73
39	74
40	76
41	83
42	85
43	87
44	88
45	89
46	91
47	93
48	95
49	96
50	99
51	102
52	103
53	106
54	110
55	112
56	114
57	116
58	118
59	120
60	122
61	123
62	124
63	125
64	126
65	129
66	131
67	136
68	139
69	141
70	143
71	145
72	146