A173757 - cp's OEIS frontend

A173757 Numbers k such that exactly one of k^2 + k + 1 and k^2 + k + 11 is prime.

n	a(n)
1	0
2	4
3	7
4	9
5	13
6	14
7	16
8	18
9	21
10	23
11	24
12	25
13	27
14	28
15	29
16	30
17	33
18	34
19	39
20	45
21	47
22	50
23	51
24	52
25	54
26	56
27	57
28	58
29	59
30	60
31	61
32	66
33	67
34	68
35	69
36	71
37	73
38	77
39	81
40	83
41	84
42	85
43	89
44	90
45	93
46	94
47	96
48	99
49	100
50	103
51	105
52	106
53	108
54	110
55	111
56	113
57	114
58	117
59	119
60	122
61	123
62	124
63	125
64	127
65	130

[0, 4, 7, 9, 13, 14, 16, 18, 21, 23, 24, 25, 27, 28, 29, 30, 33, 34, 39, 45, 47, 50, 51, 52, 54, 56, 57, 58, 59, 60, 61, 66, 67, 68, 69, 71, 73, 77, 81, 83, 84, 85, 89, 90, 93, 94, 96, 99, 100, 103, 105, 106, 108, 110, 111, 113, 114, 117, 119, 122, 123, 124, 125, 127, 130]

cp's OEIS Frontend

A173757 Numbers k such that exactly one of k^2 + k + 1 and k^2 + k + 11 is prime.

Table of values

List of values

n	a(n)
1	0
2	4
3	7
4	9
5	13
6	14
7	16
8	18
9	21
10	23
11	24
12	25
13	27
14	28
15	29
16	30
17	33
18	34
19	39
20	45
21	47
22	50
23	51
24	52
25	54
26	56
27	57
28	58
29	59
30	60
31	61
32	66
33	67
34	68
35	69
36	71
37	73
38	77
39	81
40	83
41	84
42	85
43	89
44	90
45	93
46	94
47	96
48	99
49	100
50	103
51	105
52	106
53	108
54	110
55	111
56	113
57	114
58	117
59	119
60	122
61	123
62	124
63	125
64	127
65	130

n	a(n)
1	0
2	4
3	7
4	9
5	13
6	14
7	16
8	18
9	21
10	23
11	24
12	25
13	27
14	28
15	29
16	30
17	33
18	34
19	39
20	45
21	47
22	50
23	51
24	52
25	54
26	56
27	57
28	58
29	59
30	60
31	61
32	66
33	67
34	68
35	69
36	71
37	73
38	77
39	81
40	83
41	84
42	85
43	89
44	90
45	93
46	94
47	96
48	99
49	100
50	103
51	105
52	106
53	108
54	110
55	111
56	113
57	114
58	117
59	119
60	122
61	123
62	124
63	125
64	127
65	130

n	a(n)
1	0
2	4
3	7
4	9
5	13
6	14
7	16
8	18
9	21
10	23
11	24
12	25
13	27
14	28
15	29
16	30
17	33
18	34
19	39
20	45
21	47
22	50
23	51
24	52
25	54
26	56
27	57
28	58
29	59
30	60
31	61
32	66
33	67
34	68
35	69
36	71
37	73
38	77
39	81
40	83
41	84
42	85
43	89
44	90
45	93
46	94
47	96
48	99
49	100
50	103
51	105
52	106
53	108
54	110
55	111
56	113
57	114
58	117
59	119
60	122
61	123
62	124
63	125
64	127
65	130