A173001 - cp's OEIS frontend

A173001 Values of n such that exactly one of 5n+1 and 5n^2+5n+1 is prime.

n	a(n)
1	1
2	3
3	4
4	5
5	7
6	8
7	11
8	12
9	13
10	15
11	16
12	17
13	19
14	20
15	21
16	22
17	24
18	25
19	32
20	35
21	42
22	43
23	44
24	48
25	49
26	50
27	52
28	55
29	56
30	60
31	61
32	63
33	69
34	70
35	71
36	73
37	74
38	79
39	81
40	82
41	84
42	85
43	86
44	87
45	88
46	92
47	93
48	94
49	98
50	101
51	106
52	107
53	108
54	109
55	110
56	112
57	115
58	117
59	120
60	123
61	126
62	127
63	131
64	132
65	135
66	137

[1, 3, 4, 5, 7, 8, 11, 12, 13, 15, 16, 17, 19, 20, 21, 22, 24, 25, 32, 35, 42, 43, 44, 48, 49, 50, 52, 55, 56, 60, 61, 63, 69, 70, 71, 73, 74, 79, 81, 82, 84, 85, 86, 87, 88, 92, 93, 94, 98, 101, 106, 107, 108, 109, 110, 112, 115, 117, 120, 123, 126, 127, 131, 132, 135, 137]

cp's OEIS Frontend

A173001 Values of n such that exactly one of 5n+1 and 5n^2+5n+1 is prime.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	5
5	7
6	8
7	11
8	12
9	13
10	15
11	16
12	17
13	19
14	20
15	21
16	22
17	24
18	25
19	32
20	35
21	42
22	43
23	44
24	48
25	49
26	50
27	52
28	55
29	56
30	60
31	61
32	63
33	69
34	70
35	71
36	73
37	74
38	79
39	81
40	82
41	84
42	85
43	86
44	87
45	88
46	92
47	93
48	94
49	98
50	101
51	106
52	107
53	108
54	109
55	110
56	112
57	115
58	117
59	120
60	123
61	126
62	127
63	131
64	132
65	135
66	137

n	a(n)
1	1
2	3
3	4
4	5
5	7
6	8
7	11
8	12
9	13
10	15
11	16
12	17
13	19
14	20
15	21
16	22
17	24
18	25
19	32
20	35
21	42
22	43
23	44
24	48
25	49
26	50
27	52
28	55
29	56
30	60
31	61
32	63
33	69
34	70
35	71
36	73
37	74
38	79
39	81
40	82
41	84
42	85
43	86
44	87
45	88
46	92
47	93
48	94
49	98
50	101
51	106
52	107
53	108
54	109
55	110
56	112
57	115
58	117
59	120
60	123
61	126
62	127
63	131
64	132
65	135
66	137

n	a(n)
1	1
2	3
3	4
4	5
5	7
6	8
7	11
8	12
9	13
10	15
11	16
12	17
13	19
14	20
15	21
16	22
17	24
18	25
19	32
20	35
21	42
22	43
23	44
24	48
25	49
26	50
27	52
28	55
29	56
30	60
31	61
32	63
33	69
34	70
35	71
36	73
37	74
38	79
39	81
40	82
41	84
42	85
43	86
44	87
45	88
46	92
47	93
48	94
49	98
50	101
51	106
52	107
53	108
54	109
55	110
56	112
57	115
58	117
59	120
60	123
61	126
62	127
63	131
64	132
65	135
66	137