A256210 - cp's OEIS frontend

A256210 Lexicographically earliest permutation of positive integers starting with 2 such that a(a(n)+a(n+1)) is odd for all n.

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

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

cp's OEIS Frontend

A256210 Lexicographically earliest permutation of positive integers starting with 2 such that a(a(n)+a(n+1)) is odd for all n.

Table of values

List of values

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

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

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