A365705 - cp's OEIS frontend

A365705 Underline the digit immediately to the right of the center of each term (see the Comments section for the definition of "center"). This is the lexicographically earliest sequence of distinct integers > 9 such that the successive underlined digits duplicate the sequence itself, digit by digit.

n	a(n)
1	11
2	21
3	12
4	31
5	41
6	22
7	13
8	51
9	14
10	61
11	32
12	42
13	71
14	23
15	15
16	81
17	91
18	24
19	16
20	101
21	33
22	52
23	34
24	62
25	17
26	111
27	72
28	43
29	121
30	25
31	18
32	131
33	19
34	141
35	82
36	44
37	151
38	26
39	161
40	10
41	171
42	53
43	63
44	35
45	92
46	73
47	54
48	36
49	102
50	181
51	27
52	191
53	201
54	211
55	37
56	112
57	64
58	83
59	221
60	122
61	231
62	132
63	45
64	241
65	28
66	251
67	93

[11, 21, 12, 31, 41, 22, 13, 51, 14, 61, 32, 42, 71, 23, 15, 81, 91, 24, 16, 101, 33, 52, 34, 62, 17, 111, 72, 43, 121, 25, 18, 131, 19, 141, 82, 44, 151, 26, 161, 10, 171, 53, 63, 35, 92, 73, 54, 36, 102, 181, 27, 191, 201, 211, 37, 112, 64, 83, 221, 122, 231, 132, 45, 241, 28, 251, 93]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	11
2	21
3	12
4	31
5	41
6	22
7	13
8	51
9	14
10	61
11	32
12	42
13	71
14	23
15	15
16	81
17	91
18	24
19	16
20	101
21	33
22	52
23	34
24	62
25	17
26	111
27	72
28	43
29	121
30	25
31	18
32	131
33	19
34	141
35	82
36	44
37	151
38	26
39	161
40	10
41	171
42	53
43	63
44	35
45	92
46	73
47	54
48	36
49	102
50	181
51	27
52	191
53	201
54	211
55	37
56	112
57	64
58	83
59	221
60	122
61	231
62	132
63	45
64	241
65	28
66	251
67	93

n	a(n)
1	11
2	21
3	12
4	31
5	41
6	22
7	13
8	51
9	14
10	61
11	32
12	42
13	71
14	23
15	15
16	81
17	91
18	24
19	16
20	101
21	33
22	52
23	34
24	62
25	17
26	111
27	72
28	43
29	121
30	25
31	18
32	131
33	19
34	141
35	82
36	44
37	151
38	26
39	161
40	10
41	171
42	53
43	63
44	35
45	92
46	73
47	54
48	36
49	102
50	181
51	27
52	191
53	201
54	211
55	37
56	112
57	64
58	83
59	221
60	122
61	231
62	132
63	45
64	241
65	28
66	251
67	93

n	a(n)
1	11
2	21
3	12
4	31
5	41
6	22
7	13
8	51
9	14
10	61
11	32
12	42
13	71
14	23
15	15
16	81
17	91
18	24
19	16
20	101
21	33
22	52
23	34
24	62
25	17
26	111
27	72
28	43
29	121
30	25
31	18
32	131
33	19
34	141
35	82
36	44
37	151
38	26
39	161
40	10
41	171
42	53
43	63
44	35
45	92
46	73
47	54
48	36
49	102
50	181
51	27
52	191
53	201
54	211
55	37
56	112
57	64
58	83
59	221
60	122
61	231
62	132
63	45
64	241
65	28
66	251
67	93