A026239 - cp's OEIS frontend

A026239 Beginning with the natural numbers, swap the k-th prime and k-th composite.

n	a(n)
1	1
2	4
3	6
4	2
5	8
6	3
7	9
8	5
9	7
10	11
11	10
12	13
13	12
14	17
15	19
16	23
17	14
18	29
19	15
20	31
21	37
22	41
23	16
24	43
25	47
26	53
27	59
28	61
29	18
30	67
31	20
32	71
33	73
34	79
35	83
36	89
37	21
38	97
39	101
40	103
41	22
42	107
43	24
44	109
45	113
46	127
47	25
48	131
49	137
50	139
51	149
52	151
53	26
54	157
55	163
56	167
57	173
58	179
59	27
60	181
61	28
62	191
63	193
64	197
65	199

[1, 4, 6, 2, 8, 3, 9, 5, 7, 11, 10, 13, 12, 17, 19, 23, 14, 29, 15, 31, 37, 41, 16, 43, 47, 53, 59, 61, 18, 67, 20, 71, 73, 79, 83, 89, 21, 97, 101, 103, 22, 107, 24, 109, 113, 127, 25, 131, 137, 139, 149, 151, 26, 157, 163, 167, 173, 179, 27, 181, 28, 191, 193, 197, 199]

cp's OEIS Frontend

A026239 Beginning with the natural numbers, swap the k-th prime and k-th composite.

Table of values

List of values

n	a(n)
1	1
2	4
3	6
4	2
5	8
6	3
7	9
8	5
9	7
10	11
11	10
12	13
13	12
14	17
15	19
16	23
17	14
18	29
19	15
20	31
21	37
22	41
23	16
24	43
25	47
26	53
27	59
28	61
29	18
30	67
31	20
32	71
33	73
34	79
35	83
36	89
37	21
38	97
39	101
40	103
41	22
42	107
43	24
44	109
45	113
46	127
47	25
48	131
49	137
50	139
51	149
52	151
53	26
54	157
55	163
56	167
57	173
58	179
59	27
60	181
61	28
62	191
63	193
64	197
65	199

n	a(n)
1	1
2	4
3	6
4	2
5	8
6	3
7	9
8	5
9	7
10	11
11	10
12	13
13	12
14	17
15	19
16	23
17	14
18	29
19	15
20	31
21	37
22	41
23	16
24	43
25	47
26	53
27	59
28	61
29	18
30	67
31	20
32	71
33	73
34	79
35	83
36	89
37	21
38	97
39	101
40	103
41	22
42	107
43	24
44	109
45	113
46	127
47	25
48	131
49	137
50	139
51	149
52	151
53	26
54	157
55	163
56	167
57	173
58	179
59	27
60	181
61	28
62	191
63	193
64	197
65	199

n	a(n)
1	1
2	4
3	6
4	2
5	8
6	3
7	9
8	5
9	7
10	11
11	10
12	13
13	12
14	17
15	19
16	23
17	14
18	29
19	15
20	31
21	37
22	41
23	16
24	43
25	47
26	53
27	59
28	61
29	18
30	67
31	20
32	71
33	73
34	79
35	83
36	89
37	21
38	97
39	101
40	103
41	22
42	107
43	24
44	109
45	113
46	127
47	25
48	131
49	137
50	139
51	149
52	151
53	26
54	157
55	163
56	167
57	173
58	179
59	27
60	181
61	28
62	191
63	193
64	197
65	199