A358767 - cp's OEIS frontend

A358767 Numbers k with an even number of prime factors (when counted with multiplicity) in sigma(k), the sum of divisors of k.

n	a(n)
1	1
2	3
3	5
4	8
5	13
6	14
7	15
8	18
9	22
10	23
11	24
12	27
13	28
14	34
15	36
16	37
17	38
18	39
19	40
20	42
21	44
22	49
23	50
24	53
25	58
26	59
27	61
28	62
29	63
30	65
31	66
32	68
33	69
34	70
35	73
36	76
37	77
38	81
39	82
40	83
41	84
42	86
43	89
44	90
45	94
46	99
47	100
48	102
49	103
50	104
51	110
52	111
53	112
54	114
55	115
56	116
57	119
58	120
59	121
60	124
61	125
62	131
63	132
64	133
65	134
66	135
67	139
68	140
69	142
70	144

[1, 3, 5, 8, 13, 14, 15, 18, 22, 23, 24, 27, 28, 34, 36, 37, 38, 39, 40, 42, 44, 49, 50, 53, 58, 59, 61, 62, 63, 65, 66, 68, 69, 70, 73, 76, 77, 81, 82, 83, 84, 86, 89, 90, 94, 99, 100, 102, 103, 104, 110, 111, 112, 114, 115, 116, 119, 120, 121, 124, 125, 131, 132, 133, 134, 135, 139, 140, 142, 144]

cp's OEIS Frontend

A358767 Numbers k with an even 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	1
2	3
3	5
4	8
5	13
6	14
7	15
8	18
9	22
10	23
11	24
12	27
13	28
14	34
15	36
16	37
17	38
18	39
19	40
20	42
21	44
22	49
23	50
24	53
25	58
26	59
27	61
28	62
29	63
30	65
31	66
32	68
33	69
34	70
35	73
36	76
37	77
38	81
39	82
40	83
41	84
42	86
43	89
44	90
45	94
46	99
47	100
48	102
49	103
50	104
51	110
52	111
53	112
54	114
55	115
56	116
57	119
58	120
59	121
60	124
61	125
62	131
63	132
64	133
65	134
66	135
67	139
68	140
69	142
70	144

n	a(n)
1	1
2	3
3	5
4	8
5	13
6	14
7	15
8	18
9	22
10	23
11	24
12	27
13	28
14	34
15	36
16	37
17	38
18	39
19	40
20	42
21	44
22	49
23	50
24	53
25	58
26	59
27	61
28	62
29	63
30	65
31	66
32	68
33	69
34	70
35	73
36	76
37	77
38	81
39	82
40	83
41	84
42	86
43	89
44	90
45	94
46	99
47	100
48	102
49	103
50	104
51	110
52	111
53	112
54	114
55	115
56	116
57	119
58	120
59	121
60	124
61	125
62	131
63	132
64	133
65	134
66	135
67	139
68	140
69	142
70	144

n	a(n)
1	1
2	3
3	5
4	8
5	13
6	14
7	15
8	18
9	22
10	23
11	24
12	27
13	28
14	34
15	36
16	37
17	38
18	39
19	40
20	42
21	44
22	49
23	50
24	53
25	58
26	59
27	61
28	62
29	63
30	65
31	66
32	68
33	69
34	70
35	73
36	76
37	77
38	81
39	82
40	83
41	84
42	86
43	89
44	90
45	94
46	99
47	100
48	102
49	103
50	104
51	110
52	111
53	112
54	114
55	115
56	116
57	119
58	120
59	121
60	124
61	125
62	131
63	132
64	133
65	134
66	135
67	139
68	140
69	142
70	144