A358768 - cp's OEIS frontend

A358768 Numbers k with an odd number of prime factors (when counted with multiplicity) in sigma(k), the sum of divisors of k.

n	a(n)
1	2
2	4
3	6
4	7
5	9
6	10
7	11
8	12
9	16
10	17
11	19
12	20
13	21
14	25
15	26
16	29
17	30
18	31
19	32
20	33
21	35
22	41
23	43
24	45
25	46
26	47
27	48
28	51
29	52
30	54
31	55
32	56
33	57
34	60
35	64
36	67
37	71
38	72
39	74
40	75
41	78
42	79
43	80
44	85
45	87
46	88
47	91
48	92
49	93
50	95
51	96
52	97
53	98
54	101
55	105
56	106
57	107
58	108
59	109
60	113
61	117
62	118
63	122
64	123
65	126
66	127
67	128
68	129
69	130
70	136
71	137
72	138

[2, 4, 6, 7, 9, 10, 11, 12, 16, 17, 19, 20, 21, 25, 26, 29, 30, 31, 32, 33, 35, 41, 43, 45, 46, 47, 48, 51, 52, 54, 55, 56, 57, 60, 64, 67, 71, 72, 74, 75, 78, 79, 80, 85, 87, 88, 91, 92, 93, 95, 96, 97, 98, 101, 105, 106, 107, 108, 109, 113, 117, 118, 122, 123, 126, 127, 128, 129, 130, 136, 137, 138]

cp's OEIS Frontend

A358768 Numbers k with an odd number of prime factors (when counted with multiplicity) in sigma(k), the sum of divisors of k.

Table of values

List of values

n	a(n)
1	2
2	4
3	6
4	7
5	9
6	10
7	11
8	12
9	16
10	17
11	19
12	20
13	21
14	25
15	26
16	29
17	30
18	31
19	32
20	33
21	35
22	41
23	43
24	45
25	46
26	47
27	48
28	51
29	52
30	54
31	55
32	56
33	57
34	60
35	64
36	67
37	71
38	72
39	74
40	75
41	78
42	79
43	80
44	85
45	87
46	88
47	91
48	92
49	93
50	95
51	96
52	97
53	98
54	101
55	105
56	106
57	107
58	108
59	109
60	113
61	117
62	118
63	122
64	123
65	126
66	127
67	128
68	129
69	130
70	136
71	137
72	138

n	a(n)
1	2
2	4
3	6
4	7
5	9
6	10
7	11
8	12
9	16
10	17
11	19
12	20
13	21
14	25
15	26
16	29
17	30
18	31
19	32
20	33
21	35
22	41
23	43
24	45
25	46
26	47
27	48
28	51
29	52
30	54
31	55
32	56
33	57
34	60
35	64
36	67
37	71
38	72
39	74
40	75
41	78
42	79
43	80
44	85
45	87
46	88
47	91
48	92
49	93
50	95
51	96
52	97
53	98
54	101
55	105
56	106
57	107
58	108
59	109
60	113
61	117
62	118
63	122
64	123
65	126
66	127
67	128
68	129
69	130
70	136
71	137
72	138

n	a(n)
1	2
2	4
3	6
4	7
5	9
6	10
7	11
8	12
9	16
10	17
11	19
12	20
13	21
14	25
15	26
16	29
17	30
18	31
19	32
20	33
21	35
22	41
23	43
24	45
25	46
26	47
27	48
28	51
29	52
30	54
31	55
32	56
33	57
34	60
35	64
36	67
37	71
38	72
39	74
40	75
41	78
42	79
43	80
44	85
45	87
46	88
47	91
48	92
49	93
50	95
51	96
52	97
53	98
54	101
55	105
56	106
57	107
58	108
59	109
60	113
61	117
62	118
63	122
64	123
65	126
66	127
67	128
68	129
69	130
70	136
71	137
72	138