A206798 - cp's OEIS frontend

A206798 Beginning with the natural numbers, swap the k-th composite number (A002808) and k-th noncomposite number (A008578), for k = 1,2,3,...

n	a(n)
1	4
2	6
3	8
4	1
5	9
6	2
7	10
8	3
9	5
10	7
11	12
12	11
13	14
14	13
15	17
16	19
17	15
18	23
19	16
20	29
21	31
22	37
23	18
24	41
25	43
26	47
27	53
28	59
29	20
30	61
31	21
32	67
33	71
34	73
35	79
36	83
37	22
38	89
39	97
40	101
41	24
42	103
43	25
44	107
45	109
46	113
47	26
48	127
49	131
50	137
51	139
52	149
53	27
54	151
55	157
56	163
57	167
58	173
59	28
60	179
61	30
62	181
63	191

[4, 6, 8, 1, 9, 2, 10, 3, 5, 7, 12, 11, 14, 13, 17, 19, 15, 23, 16, 29, 31, 37, 18, 41, 43, 47, 53, 59, 20, 61, 21, 67, 71, 73, 79, 83, 22, 89, 97, 101, 24, 103, 25, 107, 109, 113, 26, 127, 131, 137, 139, 149, 27, 151, 157, 163, 167, 173, 28, 179, 30, 181, 191]

cp's OEIS Frontend

A206798 Beginning with the natural numbers, swap the k-th composite number (A002808) and k-th noncomposite number (A008578), for k = 1,2,3,...

Table of values

List of values

n	a(n)
1	4
2	6
3	8
4	1
5	9
6	2
7	10
8	3
9	5
10	7
11	12
12	11
13	14
14	13
15	17
16	19
17	15
18	23
19	16
20	29
21	31
22	37
23	18
24	41
25	43
26	47
27	53
28	59
29	20
30	61
31	21
32	67
33	71
34	73
35	79
36	83
37	22
38	89
39	97
40	101
41	24
42	103
43	25
44	107
45	109
46	113
47	26
48	127
49	131
50	137
51	139
52	149
53	27
54	151
55	157
56	163
57	167
58	173
59	28
60	179
61	30
62	181
63	191

n	a(n)
1	4
2	6
3	8
4	1
5	9
6	2
7	10
8	3
9	5
10	7
11	12
12	11
13	14
14	13
15	17
16	19
17	15
18	23
19	16
20	29
21	31
22	37
23	18
24	41
25	43
26	47
27	53
28	59
29	20
30	61
31	21
32	67
33	71
34	73
35	79
36	83
37	22
38	89
39	97
40	101
41	24
42	103
43	25
44	107
45	109
46	113
47	26
48	127
49	131
50	137
51	139
52	149
53	27
54	151
55	157
56	163
57	167
58	173
59	28
60	179
61	30
62	181
63	191

n	a(n)
1	4
2	6
3	8
4	1
5	9
6	2
7	10
8	3
9	5
10	7
11	12
12	11
13	14
14	13
15	17
16	19
17	15
18	23
19	16
20	29
21	31
22	37
23	18
24	41
25	43
26	47
27	53
28	59
29	20
30	61
31	21
32	67
33	71
34	73
35	79
36	83
37	22
38	89
39	97
40	101
41	24
42	103
43	25
44	107
45	109
46	113
47	26
48	127
49	131
50	137
51	139
52	149
53	27
54	151
55	157
56	163
57	167
58	173
59	28
60	179
61	30
62	181
63	191