A069570 - cp's OEIS frontend

A069570 Numbers n in which the k-th digit (counted from the right) is nonzero and either a divisor or a multiple of k, for all 1 <= k <= number of digits of n.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	14
14	15
15	16
16	17
17	18
18	19
19	21
20	22
21	23
22	24
23	25
24	26
25	27
26	28
27	29
28	41
29	42
30	43
31	44
32	45
33	46
34	47
35	48
36	49
37	61
38	62
39	63
40	64
41	65
42	66
43	67
44	68
45	69
46	81
47	82
48	83
49	84
50	85
51	86
52	87
53	88
54	89
55	111
56	112
57	113
58	114
59	115
60	116
61	117
62	118
63	119
64	121
65	122
66	123
67	124
68	125

[1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28, 29, 41, 42, 43, 44, 45, 46, 47, 48, 49, 61, 62, 63, 64, 65, 66, 67, 68, 69, 81, 82, 83, 84, 85, 86, 87, 88, 89, 111, 112, 113, 114, 115, 116, 117, 118, 119, 121, 122, 123, 124, 125]

cp's OEIS Frontend

A069570 Numbers n in which the k-th digit (counted from the right) is nonzero and either a divisor or a multiple of k, for all 1 <= k <= number of digits of n.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	14
14	15
15	16
16	17
17	18
18	19
19	21
20	22
21	23
22	24
23	25
24	26
25	27
26	28
27	29
28	41
29	42
30	43
31	44
32	45
33	46
34	47
35	48
36	49
37	61
38	62
39	63
40	64
41	65
42	66
43	67
44	68
45	69
46	81
47	82
48	83
49	84
50	85
51	86
52	87
53	88
54	89
55	111
56	112
57	113
58	114
59	115
60	116
61	117
62	118
63	119
64	121
65	122
66	123
67	124
68	125

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	14
14	15
15	16
16	17
17	18
18	19
19	21
20	22
21	23
22	24
23	25
24	26
25	27
26	28
27	29
28	41
29	42
30	43
31	44
32	45
33	46
34	47
35	48
36	49
37	61
38	62
39	63
40	64
41	65
42	66
43	67
44	68
45	69
46	81
47	82
48	83
49	84
50	85
51	86
52	87
53	88
54	89
55	111
56	112
57	113
58	114
59	115
60	116
61	117
62	118
63	119
64	121
65	122
66	123
67	124
68	125

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	14
14	15
15	16
16	17
17	18
18	19
19	21
20	22
21	23
22	24
23	25
24	26
25	27
26	28
27	29
28	41
29	42
30	43
31	44
32	45
33	46
34	47
35	48
36	49
37	61
38	62
39	63
40	64
41	65
42	66
43	67
44	68
45	69
46	81
47	82
48	83
49	84
50	85
51	86
52	87
53	88
54	89
55	111
56	112
57	113
58	114
59	115
60	116
61	117
62	118
63	119
64	121
65	122
66	123
67	124
68	125