A352804 - cp's OEIS frontend

A352804 a(n) = A028876(n)/2; numbers k such that 4*k^2 - 5 is prime.

n	a(n)
1	2
2	3
3	4
4	6
5	7
6	8
7	11
8	12
9	16
10	17
11	18
12	19
13	21
14	22
15	23
16	26
17	29
18	32
19	36
20	37
21	39
22	41
23	47
24	51
25	56
26	58
27	61
28	66
29	72
30	76
31	82
32	83
33	84
34	87
35	88
36	91
37	92
38	93
39	94
40	99
41	102
42	106
43	111
44	113
45	116
46	117
47	118
48	126
49	131
50	132
51	139
52	142
53	144
54	146
55	149
56	151
57	159
58	162
59	171
60	177
61	179

[2, 3, 4, 6, 7, 8, 11, 12, 16, 17, 18, 19, 21, 22, 23, 26, 29, 32, 36, 37, 39, 41, 47, 51, 56, 58, 61, 66, 72, 76, 82, 83, 84, 87, 88, 91, 92, 93, 94, 99, 102, 106, 111, 113, 116, 117, 118, 126, 131, 132, 139, 142, 144, 146, 149, 151, 159, 162, 171, 177, 179]

cp's OEIS Frontend

A352804 a(n) = A028876(n)/2; numbers k such that 4*k^2 - 5 is prime.

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	6
5	7
6	8
7	11
8	12
9	16
10	17
11	18
12	19
13	21
14	22
15	23
16	26
17	29
18	32
19	36
20	37
21	39
22	41
23	47
24	51
25	56
26	58
27	61
28	66
29	72
30	76
31	82
32	83
33	84
34	87
35	88
36	91
37	92
38	93
39	94
40	99
41	102
42	106
43	111
44	113
45	116
46	117
47	118
48	126
49	131
50	132
51	139
52	142
53	144
54	146
55	149
56	151
57	159
58	162
59	171
60	177
61	179

n	a(n)
1	2
2	3
3	4
4	6
5	7
6	8
7	11
8	12
9	16
10	17
11	18
12	19
13	21
14	22
15	23
16	26
17	29
18	32
19	36
20	37
21	39
22	41
23	47
24	51
25	56
26	58
27	61
28	66
29	72
30	76
31	82
32	83
33	84
34	87
35	88
36	91
37	92
38	93
39	94
40	99
41	102
42	106
43	111
44	113
45	116
46	117
47	118
48	126
49	131
50	132
51	139
52	142
53	144
54	146
55	149
56	151
57	159
58	162
59	171
60	177
61	179

n	a(n)
1	2
2	3
3	4
4	6
5	7
6	8
7	11
8	12
9	16
10	17
11	18
12	19
13	21
14	22
15	23
16	26
17	29
18	32
19	36
20	37
21	39
22	41
23	47
24	51
25	56
26	58
27	61
28	66
29	72
30	76
31	82
32	83
33	84
34	87
35	88
36	91
37	92
38	93
39	94
40	99
41	102
42	106
43	111
44	113
45	116
46	117
47	118
48	126
49	131
50	132
51	139
52	142
53	144
54	146
55	149
56	151
57	159
58	162
59	171
60	177
61	179