A336954 - cp's OEIS frontend

A336954 Lexicographically earliest sequence of distinct positive terms such that, in the concatenation of the decimal representations of the terms, for any digit d at position p, d appears at some position q such that abs(p-q) = d.

n	a(n)
1	1
2	10
3	2
4	3
5	20
6	30
7	4
8	5
9	6
10	7
11	40
12	50
13	60
14	70
15	8
16	9
17	11
18	12
19	32
20	83
21	90
22	22
23	220
24	21
25	13
26	33
27	333
28	23
29	24
30	25
31	34
32	43
33	52
34	42
35	26
36	27
37	28
38	36
39	63
40	71
41	18
42	61
43	14
44	29
45	240
46	31
47	130
48	91
49	15
50	35
51	53
52	54
53	55
54	44
55	37
56	430
57	41
58	17
59	45
60	38
61	93
62	51
63	16
64	48
65	49
66	46

[1, 10, 2, 3, 20, 30, 4, 5, 6, 7, 40, 50, 60, 70, 8, 9, 11, 12, 32, 83, 90, 22, 220, 21, 13, 33, 333, 23, 24, 25, 34, 43, 52, 42, 26, 27, 28, 36, 63, 71, 18, 61, 14, 29, 240, 31, 130, 91, 15, 35, 53, 54, 55, 44, 37, 430, 41, 17, 45, 38, 93, 51, 16, 48, 49, 46]

cp's OEIS Frontend

A336954 Lexicographically earliest sequence of distinct positive terms such that, in the concatenation of the decimal representations of the terms, for any digit d at position p, d appears at some position q such that abs(p-q) = d.

Table of values

List of values

n	a(n)
1	1
2	10
3	2
4	3
5	20
6	30
7	4
8	5
9	6
10	7
11	40
12	50
13	60
14	70
15	8
16	9
17	11
18	12
19	32
20	83
21	90
22	22
23	220
24	21
25	13
26	33
27	333
28	23
29	24
30	25
31	34
32	43
33	52
34	42
35	26
36	27
37	28
38	36
39	63
40	71
41	18
42	61
43	14
44	29
45	240
46	31
47	130
48	91
49	15
50	35
51	53
52	54
53	55
54	44
55	37
56	430
57	41
58	17
59	45
60	38
61	93
62	51
63	16
64	48
65	49
66	46

n	a(n)
1	1
2	10
3	2
4	3
5	20
6	30
7	4
8	5
9	6
10	7
11	40
12	50
13	60
14	70
15	8
16	9
17	11
18	12
19	32
20	83
21	90
22	22
23	220
24	21
25	13
26	33
27	333
28	23
29	24
30	25
31	34
32	43
33	52
34	42
35	26
36	27
37	28
38	36
39	63
40	71
41	18
42	61
43	14
44	29
45	240
46	31
47	130
48	91
49	15
50	35
51	53
52	54
53	55
54	44
55	37
56	430
57	41
58	17
59	45
60	38
61	93
62	51
63	16
64	48
65	49
66	46

n	a(n)
1	1
2	10
3	2
4	3
5	20
6	30
7	4
8	5
9	6
10	7
11	40
12	50
13	60
14	70
15	8
16	9
17	11
18	12
19	32
20	83
21	90
22	22
23	220
24	21
25	13
26	33
27	333
28	23
29	24
30	25
31	34
32	43
33	52
34	42
35	26
36	27
37	28
38	36
39	63
40	71
41	18
42	61
43	14
44	29
45	240
46	31
47	130
48	91
49	15
50	35
51	53
52	54
53	55
54	44
55	37
56	430
57	41
58	17
59	45
60	38
61	93
62	51
63	16
64	48
65	49
66	46