A055266 - cp's OEIS frontend

A055266 a(n) + a(n+1) is never prime; lexicographically earliest such sequence of distinct positive integers.

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

[1, 3, 5, 4, 2, 6, 8, 7, 9, 11, 10, 12, 13, 14, 16, 17, 15, 18, 20, 19, 21, 23, 22, 24, 25, 26, 28, 27, 29, 31, 32, 30, 33, 35, 34, 36, 38, 37, 39, 41, 40, 42, 43, 44, 46, 45, 47, 48, 50, 49, 51, 53, 52, 54, 56, 55, 57, 58, 59, 60, 61, 62, 63, 65, 64, 66, 67, 68, 70, 71, 69, 72]

cp's OEIS Frontend

A055266 a(n) + a(n+1) is never prime; lexicographically earliest such sequence of distinct positive integers.

Table of values

List of values

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

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

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