A260822 - cp's OEIS frontend

A260822 Lexicographically smallest permutation of the natural numbers, such that a(n)+n is a composite number and a(n) != n.

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

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

cp's OEIS Frontend

A260822 Lexicographically smallest permutation of the natural numbers, such that a(n)+n is a composite number and a(n) != n.

Table of values

List of values

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

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

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