A379053 - cp's OEIS frontend

A379053 Lexicographically earliest infinite sequence of distinct positive numbers with the property that n is a member of the sequence iff a(n) is not a prime.

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

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

cp's OEIS Frontend

A379053 Lexicographically earliest infinite sequence of distinct positive numbers with the property that n is a member of the sequence iff a(n) is not a prime.

Table of values

List of values

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

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

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