A349144 - cp's OEIS frontend

A349144 Numbers k for which A342671(k) [= gcd(sigma(k), A003961(k))] and A349161(k) [= A003961(k)/A342671(k)] are relatively prime, where A003961(n) is fully multiplicative with a(prime(k)) = prime(k+1), and sigma is the sum of divisors function.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	10
10	11
11	12
12	13
13	14
14	15
15	16
16	17
17	18
18	19
19	21
20	22
21	23
22	25
23	26
24	28
25	29
26	30
27	31
28	33
29	34
30	35
31	36
32	37
33	38
34	39
35	41
36	42
37	43
38	45
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	55
48	57
49	58
50	59
51	61
52	62
53	63
54	64
55	65
56	66
57	67
58	68
59	69
60	70
61	71
62	73
63	74
64	75
65	76
66	77
67	78
68	79
69	81
70	82
71	83
72	84
73	85
74	86
75	87
76	89
77	90
78	91
79	93
80	94
81	95

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 25, 26, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52, 53, 55, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 84, 85, 86, 87, 89, 90, 91, 93, 94, 95]

cp's OEIS Frontend

A349144 Numbers k for which A342671(k) [= gcd(sigma(k), A003961(k))] and A349161(k) [= A003961(k)/A342671(k)] are relatively prime, where A003961(n) is fully multiplicative with a(prime(k)) = prime(k+1), and sigma is the sum of divisors function.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	10
10	11
11	12
12	13
13	14
14	15
15	16
16	17
17	18
18	19
19	21
20	22
21	23
22	25
23	26
24	28
25	29
26	30
27	31
28	33
29	34
30	35
31	36
32	37
33	38
34	39
35	41
36	42
37	43
38	45
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	55
48	57
49	58
50	59
51	61
52	62
53	63
54	64
55	65
56	66
57	67
58	68
59	69
60	70
61	71
62	73
63	74
64	75
65	76
66	77
67	78
68	79
69	81
70	82
71	83
72	84
73	85
74	86
75	87
76	89
77	90
78	91
79	93
80	94
81	95

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	10
10	11
11	12
12	13
13	14
14	15
15	16
16	17
17	18
18	19
19	21
20	22
21	23
22	25
23	26
24	28
25	29
26	30
27	31
28	33
29	34
30	35
31	36
32	37
33	38
34	39
35	41
36	42
37	43
38	45
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	55
48	57
49	58
50	59
51	61
52	62
53	63
54	64
55	65
56	66
57	67
58	68
59	69
60	70
61	71
62	73
63	74
64	75
65	76
66	77
67	78
68	79
69	81
70	82
71	83
72	84
73	85
74	86
75	87
76	89
77	90
78	91
79	93
80	94
81	95

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	9
9	10
10	11
11	12
12	13
13	14
14	15
15	16
16	17
17	18
18	19
19	21
20	22
21	23
22	25
23	26
24	28
25	29
26	30
27	31
28	33
29	34
30	35
31	36
32	37
33	38
34	39
35	41
36	42
37	43
38	45
39	46
40	47
41	48
42	49
43	50
44	51
45	52
46	53
47	55
48	57
49	58
50	59
51	61
52	62
53	63
54	64
55	65
56	66
57	67
58	68
59	69
60	70
61	71
62	73
63	74
64	75
65	76
66	77
67	78
68	79
69	81
70	82
71	83
72	84
73	85
74	86
75	87
76	89
77	90
78	91
79	93
80	94
81	95