A115859 - cp's OEIS frontend

A115859 Largest natural number m < n, such that there exists nonzero solutions to a cross-domain congruence m*i = n X i, zero if no such integer exists.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	3
8	0
9	0
10	0
11	7
12	0
13	5
14	6
15	0
16	0
17	0
18	0
19	15
20	0
21	13
22	14
23	19
24	0
25	9
26	10
27	15
28	12
29	21
30	0
31	27
32	0
33	0
34	0
35	31
36	0
37	29
38	30
39	35
40	0
41	25
42	26
43	27
44	28
45	0
46	38
47	27
48	0
49	17
50	18
51	0
52	20
53	45
54	30
55	51
56	24
57	25
58	42
59	55
60	0
61	45
62	54
63	59
64	0
65	0
66	0
67	63
68	0
69	61
70	62
71	67
72	0
73	57
74	58
75	71
76	60
77	69
78	70
79	63
80	0

[0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 7, 0, 5, 6, 0, 0, 0, 0, 15, 0, 13, 14, 19, 0, 9, 10, 15, 12, 21, 0, 27, 0, 0, 0, 31, 0, 29, 30, 35, 0, 25, 26, 27, 28, 0, 38, 27, 0, 17, 18, 0, 20, 45, 30, 51, 24, 25, 42, 55, 0, 45, 54, 59, 0, 0, 0, 63, 0, 61, 62, 67, 0, 57, 58, 71, 60, 69, 70, 63, 0]

cp's OEIS Frontend

A115859 Largest natural number m < n, such that there exists nonzero solutions to a cross-domain congruence m*i = n X i, zero if no such integer exists.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	3
8	0
9	0
10	0
11	7
12	0
13	5
14	6
15	0
16	0
17	0
18	0
19	15
20	0
21	13
22	14
23	19
24	0
25	9
26	10
27	15
28	12
29	21
30	0
31	27
32	0
33	0
34	0
35	31
36	0
37	29
38	30
39	35
40	0
41	25
42	26
43	27
44	28
45	0
46	38
47	27
48	0
49	17
50	18
51	0
52	20
53	45
54	30
55	51
56	24
57	25
58	42
59	55
60	0
61	45
62	54
63	59
64	0
65	0
66	0
67	63
68	0
69	61
70	62
71	67
72	0
73	57
74	58
75	71
76	60
77	69
78	70
79	63
80	0

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	3
8	0
9	0
10	0
11	7
12	0
13	5
14	6
15	0
16	0
17	0
18	0
19	15
20	0
21	13
22	14
23	19
24	0
25	9
26	10
27	15
28	12
29	21
30	0
31	27
32	0
33	0
34	0
35	31
36	0
37	29
38	30
39	35
40	0
41	25
42	26
43	27
44	28
45	0
46	38
47	27
48	0
49	17
50	18
51	0
52	20
53	45
54	30
55	51
56	24
57	25
58	42
59	55
60	0
61	45
62	54
63	59
64	0
65	0
66	0
67	63
68	0
69	61
70	62
71	67
72	0
73	57
74	58
75	71
76	60
77	69
78	70
79	63
80	0

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	0
7	3
8	0
9	0
10	0
11	7
12	0
13	5
14	6
15	0
16	0
17	0
18	0
19	15
20	0
21	13
22	14
23	19
24	0
25	9
26	10
27	15
28	12
29	21
30	0
31	27
32	0
33	0
34	0
35	31
36	0
37	29
38	30
39	35
40	0
41	25
42	26
43	27
44	28
45	0
46	38
47	27
48	0
49	17
50	18
51	0
52	20
53	45
54	30
55	51
56	24
57	25
58	42
59	55
60	0
61	45
62	54
63	59
64	0
65	0
66	0
67	63
68	0
69	61
70	62
71	67
72	0
73	57
74	58
75	71
76	60
77	69
78	70
79	63
80	0