A173472 - cp's OEIS frontend

A173472 Numbers k such that exactly one of prime(k)^2 - 2 and prime(k)^2 + 2 is prime.

n	a(n)
1	1
2	3
3	4
4	6
5	8
6	10
7	12
8	14
9	15
10	18
11	20
12	24
13	27
14	28
15	31
16	32
17	34
18	40
19	43
20	47
21	48
22	51
23	52
24	55
25	62
26	65
27	68
28	72
29	82
30	86
31	87
32	91
33	94
34	99
35	100
36	104
37	107
38	111
39	119
40	123
41	128
42	129
43	130
44	132
45	133
46	134
47	135
48	139
49	141
50	150
51	152
52	170
53	172
54	177
55	180
56	182
57	191
58	200
59	202
60	209
61	211
62	214

[1, 3, 4, 6, 8, 10, 12, 14, 15, 18, 20, 24, 27, 28, 31, 32, 34, 40, 43, 47, 48, 51, 52, 55, 62, 65, 68, 72, 82, 86, 87, 91, 94, 99, 100, 104, 107, 111, 119, 123, 128, 129, 130, 132, 133, 134, 135, 139, 141, 150, 152, 170, 172, 177, 180, 182, 191, 200, 202, 209, 211, 214]

cp's OEIS Frontend

A173472 Numbers k such that exactly one of prime(k)^2 - 2 and prime(k)^2 + 2 is prime.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	6
5	8
6	10
7	12
8	14
9	15
10	18
11	20
12	24
13	27
14	28
15	31
16	32
17	34
18	40
19	43
20	47
21	48
22	51
23	52
24	55
25	62
26	65
27	68
28	72
29	82
30	86
31	87
32	91
33	94
34	99
35	100
36	104
37	107
38	111
39	119
40	123
41	128
42	129
43	130
44	132
45	133
46	134
47	135
48	139
49	141
50	150
51	152
52	170
53	172
54	177
55	180
56	182
57	191
58	200
59	202
60	209
61	211
62	214

n	a(n)
1	1
2	3
3	4
4	6
5	8
6	10
7	12
8	14
9	15
10	18
11	20
12	24
13	27
14	28
15	31
16	32
17	34
18	40
19	43
20	47
21	48
22	51
23	52
24	55
25	62
26	65
27	68
28	72
29	82
30	86
31	87
32	91
33	94
34	99
35	100
36	104
37	107
38	111
39	119
40	123
41	128
42	129
43	130
44	132
45	133
46	134
47	135
48	139
49	141
50	150
51	152
52	170
53	172
54	177
55	180
56	182
57	191
58	200
59	202
60	209
61	211
62	214

n	a(n)
1	1
2	3
3	4
4	6
5	8
6	10
7	12
8	14
9	15
10	18
11	20
12	24
13	27
14	28
15	31
16	32
17	34
18	40
19	43
20	47
21	48
22	51
23	52
24	55
25	62
26	65
27	68
28	72
29	82
30	86
31	87
32	91
33	94
34	99
35	100
36	104
37	107
38	111
39	119
40	123
41	128
42	129
43	130
44	132
45	133
46	134
47	135
48	139
49	141
50	150
51	152
52	170
53	172
54	177
55	180
56	182
57	191
58	200
59	202
60	209
61	211
62	214