A083804 - cp's OEIS frontend

A083804 a(1) = 1. If the (n-1)th partial concatenation is divisible by n then a(n) = 0. Otherwise, a(n) is the smallest positive number such that the n-th partial concatenation is divisible by n.

n	a(n)
1	1
2	2
3	0
4	0
5	0
6	0
7	3
8	2
9	1
10	10
11	0
12	8
13	16
14	8
15	15
16	20
17	9
18	4
19	24
20	20
21	13
22	28
23	25
24	28
25	25
26	30
27	32
28	20
29	9
30	10
31	27
32	2
33	16
34	10
35	5
36	36
37	26
38	10
39	33
40	20
41	33
42	46
43	26
44	28
45	30
46	50
47	4
48	48
49	13
50	50
51	3
52	12
53	12
54	6
55	30
56	64
57	53
58	56
59	61
60	60
61	69
62	36
63	12
64	8
65	65
66	74
67	66
68	4
69	44
70	20
71	3
72	76
73	31
74	62
75	75
76	6
77	85
78	56

[1, 2, 0, 0, 0, 0, 3, 2, 1, 10, 0, 8, 16, 8, 15, 20, 9, 4, 24, 20, 13, 28, 25, 28, 25, 30, 32, 20, 9, 10, 27, 2, 16, 10, 5, 36, 26, 10, 33, 20, 33, 46, 26, 28, 30, 50, 4, 48, 13, 50, 3, 12, 12, 6, 30, 64, 53, 56, 61, 60, 69, 36, 12, 8, 65, 74, 66, 4, 44, 20, 3, 76, 31, 62, 75, 6, 85, 56]

cp's OEIS Frontend

A083804 a(1) = 1. If the (n-1)th partial concatenation is divisible by n then a(n) = 0. Otherwise, a(n) is the smallest positive number such that the n-th partial concatenation is divisible by n.

Table of values

List of values

n	a(n)
1	1
2	2
3	0
4	0
5	0
6	0
7	3
8	2
9	1
10	10
11	0
12	8
13	16
14	8
15	15
16	20
17	9
18	4
19	24
20	20
21	13
22	28
23	25
24	28
25	25
26	30
27	32
28	20
29	9
30	10
31	27
32	2
33	16
34	10
35	5
36	36
37	26
38	10
39	33
40	20
41	33
42	46
43	26
44	28
45	30
46	50
47	4
48	48
49	13
50	50
51	3
52	12
53	12
54	6
55	30
56	64
57	53
58	56
59	61
60	60
61	69
62	36
63	12
64	8
65	65
66	74
67	66
68	4
69	44
70	20
71	3
72	76
73	31
74	62
75	75
76	6
77	85
78	56

n	a(n)
1	1
2	2
3	0
4	0
5	0
6	0
7	3
8	2
9	1
10	10
11	0
12	8
13	16
14	8
15	15
16	20
17	9
18	4
19	24
20	20
21	13
22	28
23	25
24	28
25	25
26	30
27	32
28	20
29	9
30	10
31	27
32	2
33	16
34	10
35	5
36	36
37	26
38	10
39	33
40	20
41	33
42	46
43	26
44	28
45	30
46	50
47	4
48	48
49	13
50	50
51	3
52	12
53	12
54	6
55	30
56	64
57	53
58	56
59	61
60	60
61	69
62	36
63	12
64	8
65	65
66	74
67	66
68	4
69	44
70	20
71	3
72	76
73	31
74	62
75	75
76	6
77	85
78	56

n	a(n)
1	1
2	2
3	0
4	0
5	0
6	0
7	3
8	2
9	1
10	10
11	0
12	8
13	16
14	8
15	15
16	20
17	9
18	4
19	24
20	20
21	13
22	28
23	25
24	28
25	25
26	30
27	32
28	20
29	9
30	10
31	27
32	2
33	16
34	10
35	5
36	36
37	26
38	10
39	33
40	20
41	33
42	46
43	26
44	28
45	30
46	50
47	4
48	48
49	13
50	50
51	3
52	12
53	12
54	6
55	30
56	64
57	53
58	56
59	61
60	60
61	69
62	36
63	12
64	8
65	65
66	74
67	66
68	4
69	44
70	20
71	3
72	76
73	31
74	62
75	75
76	6
77	85
78	56