A071065 - cp's OEIS frontend

A071065 A permutation of natural numbers: a(1)=2 a(n) is the smallest integer different from a(1), a(2), a(3), ..., a(n-1) such that a(n)+n is prime.

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

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

cp's OEIS Frontend

A071065 A permutation of natural numbers: a(1)=2 a(n) is the smallest integer different from a(1), a(2), a(3), ..., a(n-1) such that a(n)+n is prime.

Table of values

List of values

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

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

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