A345966 - cp's OEIS frontend

A345966 The succession of nonprime and prime terms is kept when you consider the sequence formed by the successive sums a(n) + a(n+1). This is the lexicographically earliest sequence of distinct positive terms with this property.

n	a(n)
1	1
2	3
3	2
4	5
5	6
6	4
7	8
8	7
9	10
10	11
11	12
12	9
13	13
14	16
15	14
16	18
17	15
18	17
19	20
20	19
21	22
22	23
23	24
24	21
25	25
26	26
27	28
28	27
29	29
30	30
31	32
32	31
33	36
34	33
35	35
36	34
37	38
38	37
39	42
40	39
41	41
42	48
43	40
44	44
45	43
46	46
47	45
48	47
49	50
50	49
51	51
52	53
53	54
54	52
55	56
56	55
57	57
58	58
59	59
60	68
61	60
62	61
63	66
64	62
65	63
66	65
67	64
68	69
69	67
70	70
71	71
72	78
73	72
74	73
75	76
76	74
77	79
78	84
79	75
80	77

[1, 3, 2, 5, 6, 4, 8, 7, 10, 11, 12, 9, 13, 16, 14, 18, 15, 17, 20, 19, 22, 23, 24, 21, 25, 26, 28, 27, 29, 30, 32, 31, 36, 33, 35, 34, 38, 37, 42, 39, 41, 48, 40, 44, 43, 46, 45, 47, 50, 49, 51, 53, 54, 52, 56, 55, 57, 58, 59, 68, 60, 61, 66, 62, 63, 65, 64, 69, 67, 70, 71, 78, 72, 73, 76, 74, 79, 84, 75, 77]

cp's OEIS Frontend

A345966 The succession of nonprime and prime terms is kept when you consider the sequence formed by the successive sums a(n) + a(n+1). This is the lexicographically earliest sequence of distinct positive terms with this property.

Table of values

List of values

n	a(n)
1	1
2	3
3	2
4	5
5	6
6	4
7	8
8	7
9	10
10	11
11	12
12	9
13	13
14	16
15	14
16	18
17	15
18	17
19	20
20	19
21	22
22	23
23	24
24	21
25	25
26	26
27	28
28	27
29	29
30	30
31	32
32	31
33	36
34	33
35	35
36	34
37	38
38	37
39	42
40	39
41	41
42	48
43	40
44	44
45	43
46	46
47	45
48	47
49	50
50	49
51	51
52	53
53	54
54	52
55	56
56	55
57	57
58	58
59	59
60	68
61	60
62	61
63	66
64	62
65	63
66	65
67	64
68	69
69	67
70	70
71	71
72	78
73	72
74	73
75	76
76	74
77	79
78	84
79	75
80	77

n	a(n)
1	1
2	3
3	2
4	5
5	6
6	4
7	8
8	7
9	10
10	11
11	12
12	9
13	13
14	16
15	14
16	18
17	15
18	17
19	20
20	19
21	22
22	23
23	24
24	21
25	25
26	26
27	28
28	27
29	29
30	30
31	32
32	31
33	36
34	33
35	35
36	34
37	38
38	37
39	42
40	39
41	41
42	48
43	40
44	44
45	43
46	46
47	45
48	47
49	50
50	49
51	51
52	53
53	54
54	52
55	56
56	55
57	57
58	58
59	59
60	68
61	60
62	61
63	66
64	62
65	63
66	65
67	64
68	69
69	67
70	70
71	71
72	78
73	72
74	73
75	76
76	74
77	79
78	84
79	75
80	77

n	a(n)
1	1
2	3
3	2
4	5
5	6
6	4
7	8
8	7
9	10
10	11
11	12
12	9
13	13
14	16
15	14
16	18
17	15
18	17
19	20
20	19
21	22
22	23
23	24
24	21
25	25
26	26
27	28
28	27
29	29
30	30
31	32
32	31
33	36
34	33
35	35
36	34
37	38
38	37
39	42
40	39
41	41
42	48
43	40
44	44
45	43
46	46
47	45
48	47
49	50
50	49
51	51
52	53
53	54
54	52
55	56
56	55
57	57
58	58
59	59
60	68
61	60
62	61
63	66
64	62
65	63
66	65
67	64
68	69
69	67
70	70
71	71
72	78
73	72
74	73
75	76
76	74
77	79
78	84
79	75
80	77