A026142 - cp's OEIS frontend

A026142 Lexicographically earliest permutation of the positive integers such that for n >= 2, |a(n)-n| = [(a(n)+1)/2].

n	a(n)
1	1
2	4
3	2
4	8
5	3
6	12
7	14
8	5
9	6
10	20
11	7
12	24
13	26
14	9
15	10
16	32
17	11
18	36
19	38
20	13
21	42
22	44
23	15
24	16
25	50
26	17
27	18
28	56
29	19
30	60
31	62
32	21
33	22
34	68
35	23
36	72
37	74
38	25
39	78
40	80
41	27
42	28
43	86
44	29
45	30
46	92
47	31
48	96
49	98
50	33
51	34
52	104
53	35
54	108
55	110
56	37
57	114
58	116
59	39
60	40
61	122
62	41
63	126
64	128
65	43
66	132

[1, 4, 2, 8, 3, 12, 14, 5, 6, 20, 7, 24, 26, 9, 10, 32, 11, 36, 38, 13, 42, 44, 15, 16, 50, 17, 18, 56, 19, 60, 62, 21, 22, 68, 23, 72, 74, 25, 78, 80, 27, 28, 86, 29, 30, 92, 31, 96, 98, 33, 34, 104, 35, 108, 110, 37, 114, 116, 39, 40, 122, 41, 126, 128, 43, 132]

cp's OEIS Frontend

A026142 Lexicographically earliest permutation of the positive integers such that for n >= 2, |a(n)-n| = [(a(n)+1)/2].

Table of values

List of values

n	a(n)
1	1
2	4
3	2
4	8
5	3
6	12
7	14
8	5
9	6
10	20
11	7
12	24
13	26
14	9
15	10
16	32
17	11
18	36
19	38
20	13
21	42
22	44
23	15
24	16
25	50
26	17
27	18
28	56
29	19
30	60
31	62
32	21
33	22
34	68
35	23
36	72
37	74
38	25
39	78
40	80
41	27
42	28
43	86
44	29
45	30
46	92
47	31
48	96
49	98
50	33
51	34
52	104
53	35
54	108
55	110
56	37
57	114
58	116
59	39
60	40
61	122
62	41
63	126
64	128
65	43
66	132

n	a(n)
1	1
2	4
3	2
4	8
5	3
6	12
7	14
8	5
9	6
10	20
11	7
12	24
13	26
14	9
15	10
16	32
17	11
18	36
19	38
20	13
21	42
22	44
23	15
24	16
25	50
26	17
27	18
28	56
29	19
30	60
31	62
32	21
33	22
34	68
35	23
36	72
37	74
38	25
39	78
40	80
41	27
42	28
43	86
44	29
45	30
46	92
47	31
48	96
49	98
50	33
51	34
52	104
53	35
54	108
55	110
56	37
57	114
58	116
59	39
60	40
61	122
62	41
63	126
64	128
65	43
66	132

n	a(n)
1	1
2	4
3	2
4	8
5	3
6	12
7	14
8	5
9	6
10	20
11	7
12	24
13	26
14	9
15	10
16	32
17	11
18	36
19	38
20	13
21	42
22	44
23	15
24	16
25	50
26	17
27	18
28	56
29	19
30	60
31	62
32	21
33	22
34	68
35	23
36	72
37	74
38	25
39	78
40	80
41	27
42	28
43	86
44	29
45	30
46	92
47	31
48	96
49	98
50	33
51	34
52	104
53	35
54	108
55	110
56	37
57	114
58	116
59	39
60	40
61	122
62	41
63	126
64	128
65	43
66	132