A067747 - cp's OEIS frontend

A067747 Primes interleaved between composite numbers: n-th prime followed by the n-th composite number.

n	a(n)
1	2
2	4
3	3
4	6
5	5
6	8
7	7
8	9
9	11
10	10
11	13
12	12
13	17
14	14
15	19
16	15
17	23
18	16
19	29
20	18
21	31
22	20
23	37
24	21
25	41
26	22
27	43
28	24
29	47
30	25
31	53
32	26
33	59
34	27
35	61
36	28
37	67
38	30
39	71
40	32
41	73
42	33
43	79
44	34
45	83
46	35
47	89
48	36
49	97
50	38
51	101
52	39
53	103
54	40
55	107
56	42
57	109
58	44
59	113
60	45
61	127
62	46
63	131
64	48
65	137
66	49
67	139

[2, 4, 3, 6, 5, 8, 7, 9, 11, 10, 13, 12, 17, 14, 19, 15, 23, 16, 29, 18, 31, 20, 37, 21, 41, 22, 43, 24, 47, 25, 53, 26, 59, 27, 61, 28, 67, 30, 71, 32, 73, 33, 79, 34, 83, 35, 89, 36, 97, 38, 101, 39, 103, 40, 107, 42, 109, 44, 113, 45, 127, 46, 131, 48, 137, 49, 139]

cp's OEIS Frontend

A067747 Primes interleaved between composite numbers: n-th prime followed by the n-th composite number.

Table of values

List of values

n	a(n)
1	2
2	4
3	3
4	6
5	5
6	8
7	7
8	9
9	11
10	10
11	13
12	12
13	17
14	14
15	19
16	15
17	23
18	16
19	29
20	18
21	31
22	20
23	37
24	21
25	41
26	22
27	43
28	24
29	47
30	25
31	53
32	26
33	59
34	27
35	61
36	28
37	67
38	30
39	71
40	32
41	73
42	33
43	79
44	34
45	83
46	35
47	89
48	36
49	97
50	38
51	101
52	39
53	103
54	40
55	107
56	42
57	109
58	44
59	113
60	45
61	127
62	46
63	131
64	48
65	137
66	49
67	139

n	a(n)
1	2
2	4
3	3
4	6
5	5
6	8
7	7
8	9
9	11
10	10
11	13
12	12
13	17
14	14
15	19
16	15
17	23
18	16
19	29
20	18
21	31
22	20
23	37
24	21
25	41
26	22
27	43
28	24
29	47
30	25
31	53
32	26
33	59
34	27
35	61
36	28
37	67
38	30
39	71
40	32
41	73
42	33
43	79
44	34
45	83
46	35
47	89
48	36
49	97
50	38
51	101
52	39
53	103
54	40
55	107
56	42
57	109
58	44
59	113
60	45
61	127
62	46
63	131
64	48
65	137
66	49
67	139

n	a(n)
1	2
2	4
3	3
4	6
5	5
6	8
7	7
8	9
9	11
10	10
11	13
12	12
13	17
14	14
15	19
16	15
17	23
18	16
19	29
20	18
21	31
22	20
23	37
24	21
25	41
26	22
27	43
28	24
29	47
30	25
31	53
32	26
33	59
34	27
35	61
36	28
37	67
38	30
39	71
40	32
41	73
42	33
43	79
44	34
45	83
46	35
47	89
48	36
49	97
50	38
51	101
52	39
53	103
54	40
55	107
56	42
57	109
58	44
59	113
60	45
61	127
62	46
63	131
64	48
65	137
66	49
67	139