A308289 - cp's OEIS frontend

A308289 Lexicographically earliest sequence of distinct nonprimes such that a(n) + a(n+1) is prime.

n	a(n)
1	1
2	4
3	9
4	8
5	15
6	14
7	27
8	10
9	21
10	16
11	25
12	6
13	35
14	12
15	49
16	18
17	55
18	24
19	65
20	32
21	39
22	20
23	33
24	26
25	45
26	22
27	51
28	28
29	69
30	34
31	63
32	38
33	75
34	52
35	57
36	40
37	87
38	44
39	93
40	46
41	81
42	50
43	77
44	30
45	119
46	48
47	91
48	36
49	95
50	42
51	85
52	54
53	125
54	56
55	111
56	62
57	105
58	58
59	99
60	64
61	115
62	66
63	133
64	60
65	121
66	70
67	123
68	68
69	129
70	82
71	117
72	74
73	153
74	76
75	135
76	88
77	141
78	86
79	143
80	80
81	147
82	92

[1, 4, 9, 8, 15, 14, 27, 10, 21, 16, 25, 6, 35, 12, 49, 18, 55, 24, 65, 32, 39, 20, 33, 26, 45, 22, 51, 28, 69, 34, 63, 38, 75, 52, 57, 40, 87, 44, 93, 46, 81, 50, 77, 30, 119, 48, 91, 36, 95, 42, 85, 54, 125, 56, 111, 62, 105, 58, 99, 64, 115, 66, 133, 60, 121, 70, 123, 68, 129, 82, 117, 74, 153, 76, 135, 88, 141, 86, 143, 80, 147, 92]

cp's OEIS Frontend

A308289 Lexicographically earliest sequence of distinct nonprimes such that a(n) + a(n+1) is prime.

Table of values

List of values

n	a(n)
1	1
2	4
3	9
4	8
5	15
6	14
7	27
8	10
9	21
10	16
11	25
12	6
13	35
14	12
15	49
16	18
17	55
18	24
19	65
20	32
21	39
22	20
23	33
24	26
25	45
26	22
27	51
28	28
29	69
30	34
31	63
32	38
33	75
34	52
35	57
36	40
37	87
38	44
39	93
40	46
41	81
42	50
43	77
44	30
45	119
46	48
47	91
48	36
49	95
50	42
51	85
52	54
53	125
54	56
55	111
56	62
57	105
58	58
59	99
60	64
61	115
62	66
63	133
64	60
65	121
66	70
67	123
68	68
69	129
70	82
71	117
72	74
73	153
74	76
75	135
76	88
77	141
78	86
79	143
80	80
81	147
82	92

n	a(n)
1	1
2	4
3	9
4	8
5	15
6	14
7	27
8	10
9	21
10	16
11	25
12	6
13	35
14	12
15	49
16	18
17	55
18	24
19	65
20	32
21	39
22	20
23	33
24	26
25	45
26	22
27	51
28	28
29	69
30	34
31	63
32	38
33	75
34	52
35	57
36	40
37	87
38	44
39	93
40	46
41	81
42	50
43	77
44	30
45	119
46	48
47	91
48	36
49	95
50	42
51	85
52	54
53	125
54	56
55	111
56	62
57	105
58	58
59	99
60	64
61	115
62	66
63	133
64	60
65	121
66	70
67	123
68	68
69	129
70	82
71	117
72	74
73	153
74	76
75	135
76	88
77	141
78	86
79	143
80	80
81	147
82	92

n	a(n)
1	1
2	4
3	9
4	8
5	15
6	14
7	27
8	10
9	21
10	16
11	25
12	6
13	35
14	12
15	49
16	18
17	55
18	24
19	65
20	32
21	39
22	20
23	33
24	26
25	45
26	22
27	51
28	28
29	69
30	34
31	63
32	38
33	75
34	52
35	57
36	40
37	87
38	44
39	93
40	46
41	81
42	50
43	77
44	30
45	119
46	48
47	91
48	36
49	95
50	42
51	85
52	54
53	125
54	56
55	111
56	62
57	105
58	58
59	99
60	64
61	115
62	66
63	133
64	60
65	121
66	70
67	123
68	68
69	129
70	82
71	117
72	74
73	153
74	76
75	135
76	88
77	141
78	86
79	143
80	80
81	147
82	92