A159698 - cp's OEIS frontend

A159698 Minimal increasing sequence beginning with 4 such that n and a(n) are either both prime or both nonprime.

n	a(n)
1	4
2	5
3	7
4	8
5	11
6	12
7	13
8	14
9	15
10	16
11	17
12	18
13	19
14	20
15	21
16	22
17	23
18	24
19	29
20	30
21	32
22	33
23	37
24	38
25	39
26	40
27	42
28	44
29	47
30	48
31	53
32	54
33	55
34	56
35	57
36	58
37	59
38	60
39	62
40	63
41	67
42	68
43	71
44	72
45	74
46	75
47	79
48	80
49	81
50	82
51	84
52	85
53	89
54	90
55	91
56	92
57	93
58	94
59	97
60	98
61	101
62	102
63	104
64	105
65	106
66	108
67	109
68	110
69	111
70	112

[4, 5, 7, 8, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 29, 30, 32, 33, 37, 38, 39, 40, 42, 44, 47, 48, 53, 54, 55, 56, 57, 58, 59, 60, 62, 63, 67, 68, 71, 72, 74, 75, 79, 80, 81, 82, 84, 85, 89, 90, 91, 92, 93, 94, 97, 98, 101, 102, 104, 105, 106, 108, 109, 110, 111, 112]

cp's OEIS Frontend

A159698 Minimal increasing sequence beginning with 4 such that n and a(n) are either both prime or both nonprime.

Table of values

List of values

n	a(n)
1	4
2	5
3	7
4	8
5	11
6	12
7	13
8	14
9	15
10	16
11	17
12	18
13	19
14	20
15	21
16	22
17	23
18	24
19	29
20	30
21	32
22	33
23	37
24	38
25	39
26	40
27	42
28	44
29	47
30	48
31	53
32	54
33	55
34	56
35	57
36	58
37	59
38	60
39	62
40	63
41	67
42	68
43	71
44	72
45	74
46	75
47	79
48	80
49	81
50	82
51	84
52	85
53	89
54	90
55	91
56	92
57	93
58	94
59	97
60	98
61	101
62	102
63	104
64	105
65	106
66	108
67	109
68	110
69	111
70	112

n	a(n)
1	4
2	5
3	7
4	8
5	11
6	12
7	13
8	14
9	15
10	16
11	17
12	18
13	19
14	20
15	21
16	22
17	23
18	24
19	29
20	30
21	32
22	33
23	37
24	38
25	39
26	40
27	42
28	44
29	47
30	48
31	53
32	54
33	55
34	56
35	57
36	58
37	59
38	60
39	62
40	63
41	67
42	68
43	71
44	72
45	74
46	75
47	79
48	80
49	81
50	82
51	84
52	85
53	89
54	90
55	91
56	92
57	93
58	94
59	97
60	98
61	101
62	102
63	104
64	105
65	106
66	108
67	109
68	110
69	111
70	112

n	a(n)
1	4
2	5
3	7
4	8
5	11
6	12
7	13
8	14
9	15
10	16
11	17
12	18
13	19
14	20
15	21
16	22
17	23
18	24
19	29
20	30
21	32
22	33
23	37
24	38
25	39
26	40
27	42
28	44
29	47
30	48
31	53
32	54
33	55
34	56
35	57
36	58
37	59
38	60
39	62
40	63
41	67
42	68
43	71
44	72
45	74
46	75
47	79
48	80
49	81
50	82
51	84
52	85
53	89
54	90
55	91
56	92
57	93
58	94
59	97
60	98
61	101
62	102
63	104
64	105
65	106
66	108
67	109
68	110
69	111
70	112