A329127 - cp's OEIS frontend

A329127 Lexicographically earliest sequence of distinct positive integers such that the concatenation of the odd-indexed terms equals the concatenation of the even-indexed terms.

n	a(n)
1	1
2	11
3	12
4	2
5	3
6	31
7	13
8	32
9	21
10	14
11	4
12	5
13	51
14	15
15	52
16	22
17	23
18	33
19	34
20	41
21	16
22	6
23	7
24	71
25	17
26	72
27	24
28	42
29	25
30	53
31	35
32	54
33	43
34	36
35	61
36	18
37	8
38	9
39	91
40	19
41	92
42	26
43	62
44	27
45	73
46	37
47	74
48	44
49	45
50	55
51	56
52	63
53	38
54	81
55	110
56	10
57	20
58	201
59	111
60	112
61	28
62	82
63	29
64	93
65	39
66	94

[1, 11, 12, 2, 3, 31, 13, 32, 21, 14, 4, 5, 51, 15, 52, 22, 23, 33, 34, 41, 16, 6, 7, 71, 17, 72, 24, 42, 25, 53, 35, 54, 43, 36, 61, 18, 8, 9, 91, 19, 92, 26, 62, 27, 73, 37, 74, 44, 45, 55, 56, 63, 38, 81, 110, 10, 20, 201, 111, 112, 28, 82, 29, 93, 39, 94]

cp's OEIS Frontend

A329127 Lexicographically earliest sequence of distinct positive integers such that the concatenation of the odd-indexed terms equals the concatenation of the even-indexed terms.

Table of values

List of values

n	a(n)
1	1
2	11
3	12
4	2
5	3
6	31
7	13
8	32
9	21
10	14
11	4
12	5
13	51
14	15
15	52
16	22
17	23
18	33
19	34
20	41
21	16
22	6
23	7
24	71
25	17
26	72
27	24
28	42
29	25
30	53
31	35
32	54
33	43
34	36
35	61
36	18
37	8
38	9
39	91
40	19
41	92
42	26
43	62
44	27
45	73
46	37
47	74
48	44
49	45
50	55
51	56
52	63
53	38
54	81
55	110
56	10
57	20
58	201
59	111
60	112
61	28
62	82
63	29
64	93
65	39
66	94

n	a(n)
1	1
2	11
3	12
4	2
5	3
6	31
7	13
8	32
9	21
10	14
11	4
12	5
13	51
14	15
15	52
16	22
17	23
18	33
19	34
20	41
21	16
22	6
23	7
24	71
25	17
26	72
27	24
28	42
29	25
30	53
31	35
32	54
33	43
34	36
35	61
36	18
37	8
38	9
39	91
40	19
41	92
42	26
43	62
44	27
45	73
46	37
47	74
48	44
49	45
50	55
51	56
52	63
53	38
54	81
55	110
56	10
57	20
58	201
59	111
60	112
61	28
62	82
63	29
64	93
65	39
66	94

n	a(n)
1	1
2	11
3	12
4	2
5	3
6	31
7	13
8	32
9	21
10	14
11	4
12	5
13	51
14	15
15	52
16	22
17	23
18	33
19	34
20	41
21	16
22	6
23	7
24	71
25	17
26	72
27	24
28	42
29	25
30	53
31	35
32	54
33	43
34	36
35	61
36	18
37	8
38	9
39	91
40	19
41	92
42	26
43	62
44	27
45	73
46	37
47	74
48	44
49	45
50	55
51	56
52	63
53	38
54	81
55	110
56	10
57	20
58	201
59	111
60	112
61	28
62	82
63	29
64	93
65	39
66	94