A075013 - cp's OEIS frontend

A075013 Smallest k such that the decimal concatenation of k and k+1 is divisible by n.

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	5
8	5
9	4
10	9
11	16
12	1
13	7
14	5
15	4
16	19
17	3
18	13
19	22
20	19
21	16
22	27
23	2
24	19
25	24
26	7
27	31
28	5
29	31
30	19
31	27
32	19
33	16
34	3
35	9
36	31
37	26
38	41
39	7
40	19
41	28
42	37
43	20
44	27
45	4
46	51
47	20
48	19
49	16
50	49
51	52
52	35
53	32
54	31
55	49
56	5
57	22
58	31
59	66
60	19
61	32
62	27
63	58
64	19
65	9
66	49
67	6
68	35
69	28
70	9
71	26
72	67
73	13
74	63
75	49
76	79
77	16

[1, 1, 1, 1, 4, 1, 5, 5, 4, 9, 16, 1, 7, 5, 4, 19, 3, 13, 22, 19, 16, 27, 2, 19, 24, 7, 31, 5, 31, 19, 27, 19, 16, 3, 9, 31, 26, 41, 7, 19, 28, 37, 20, 27, 4, 51, 20, 19, 16, 49, 52, 35, 32, 31, 49, 5, 22, 31, 66, 19, 32, 27, 58, 19, 9, 49, 6, 35, 28, 9, 26, 67, 13, 63, 49, 79, 16]

cp's OEIS Frontend

A075013 Smallest k such that the decimal concatenation of k and k+1 is divisible by n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	5
8	5
9	4
10	9
11	16
12	1
13	7
14	5
15	4
16	19
17	3
18	13
19	22
20	19
21	16
22	27
23	2
24	19
25	24
26	7
27	31
28	5
29	31
30	19
31	27
32	19
33	16
34	3
35	9
36	31
37	26
38	41
39	7
40	19
41	28
42	37
43	20
44	27
45	4
46	51
47	20
48	19
49	16
50	49
51	52
52	35
53	32
54	31
55	49
56	5
57	22
58	31
59	66
60	19
61	32
62	27
63	58
64	19
65	9
66	49
67	6
68	35
69	28
70	9
71	26
72	67
73	13
74	63
75	49
76	79
77	16

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	5
8	5
9	4
10	9
11	16
12	1
13	7
14	5
15	4
16	19
17	3
18	13
19	22
20	19
21	16
22	27
23	2
24	19
25	24
26	7
27	31
28	5
29	31
30	19
31	27
32	19
33	16
34	3
35	9
36	31
37	26
38	41
39	7
40	19
41	28
42	37
43	20
44	27
45	4
46	51
47	20
48	19
49	16
50	49
51	52
52	35
53	32
54	31
55	49
56	5
57	22
58	31
59	66
60	19
61	32
62	27
63	58
64	19
65	9
66	49
67	6
68	35
69	28
70	9
71	26
72	67
73	13
74	63
75	49
76	79
77	16

n	a(n)
1	1
2	1
3	1
4	1
5	4
6	1
7	5
8	5
9	4
10	9
11	16
12	1
13	7
14	5
15	4
16	19
17	3
18	13
19	22
20	19
21	16
22	27
23	2
24	19
25	24
26	7
27	31
28	5
29	31
30	19
31	27
32	19
33	16
34	3
35	9
36	31
37	26
38	41
39	7
40	19
41	28
42	37
43	20
44	27
45	4
46	51
47	20
48	19
49	16
50	49
51	52
52	35
53	32
54	31
55	49
56	5
57	22
58	31
59	66
60	19
61	32
62	27
63	58
64	19
65	9
66	49
67	6
68	35
69	28
70	9
71	26
72	67
73	13
74	63
75	49
76	79
77	16