A354369 - cp's OEIS frontend

A354369 Successive pairs of terms (a, b) such that (a + b) is a prime number and at least one of a and b is a prime number. This is the lexicographically earliest infinite sequence of distinct terms > 0 with this property.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	10
9	8
10	11
11	12
12	17
13	13
14	16
15	14
16	23
17	18
18	19
19	20
20	41
21	22
22	31
23	24
24	29
25	26
26	47
27	28
28	43
29	30
30	37
31	32
32	71
33	34
34	67
35	36
36	53
37	38
38	59
39	40
40	61
41	42
42	89
43	44
44	83
45	46
46	103
47	48
48	79
49	50
50	101
51	52
52	97
53	54
54	73
55	56
56	107
57	58
58	109
59	60
60	113
61	62
62	131
63	64
64	127
65	66
66	157
67	68
68	173
69	70
70	163
71	72
72	139
73	74
74	137

[1, 2, 3, 4, 5, 6, 7, 10, 8, 11, 12, 17, 13, 16, 14, 23, 18, 19, 20, 41, 22, 31, 24, 29, 26, 47, 28, 43, 30, 37, 32, 71, 34, 67, 36, 53, 38, 59, 40, 61, 42, 89, 44, 83, 46, 103, 48, 79, 50, 101, 52, 97, 54, 73, 56, 107, 58, 109, 60, 113, 62, 131, 64, 127, 66, 157, 68, 173, 70, 163, 72, 139, 74, 137]

cp's OEIS Frontend

A354369 Successive pairs of terms (a, b) such that (a + b) is a prime number and at least one of a and b is a prime number. This is the lexicographically earliest infinite sequence of distinct terms > 0 with this property.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	10
9	8
10	11
11	12
12	17
13	13
14	16
15	14
16	23
17	18
18	19
19	20
20	41
21	22
22	31
23	24
24	29
25	26
26	47
27	28
28	43
29	30
30	37
31	32
32	71
33	34
34	67
35	36
36	53
37	38
38	59
39	40
40	61
41	42
42	89
43	44
44	83
45	46
46	103
47	48
48	79
49	50
50	101
51	52
52	97
53	54
54	73
55	56
56	107
57	58
58	109
59	60
60	113
61	62
62	131
63	64
64	127
65	66
66	157
67	68
68	173
69	70
70	163
71	72
72	139
73	74
74	137

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	10
9	8
10	11
11	12
12	17
13	13
14	16
15	14
16	23
17	18
18	19
19	20
20	41
21	22
22	31
23	24
24	29
25	26
26	47
27	28
28	43
29	30
30	37
31	32
32	71
33	34
34	67
35	36
36	53
37	38
38	59
39	40
40	61
41	42
42	89
43	44
44	83
45	46
46	103
47	48
48	79
49	50
50	101
51	52
52	97
53	54
54	73
55	56
56	107
57	58
58	109
59	60
60	113
61	62
62	131
63	64
64	127
65	66
66	157
67	68
68	173
69	70
70	163
71	72
72	139
73	74
74	137

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	10
9	8
10	11
11	12
12	17
13	13
14	16
15	14
16	23
17	18
18	19
19	20
20	41
21	22
22	31
23	24
24	29
25	26
26	47
27	28
28	43
29	30
30	37
31	32
32	71
33	34
34	67
35	36
36	53
37	38
38	59
39	40
40	61
41	42
42	89
43	44
44	83
45	46
46	103
47	48
48	79
49	50
50	101
51	52
52	97
53	54
54	73
55	56
56	107
57	58
58	109
59	60
60	113
61	62
62	131
63	64
64	127
65	66
66	157
67	68
68	173
69	70
70	163
71	72
72	139
73	74
74	137