A279535 - cp's OEIS frontend

A279535 Triangle read by rows: The number of digits in the smallest 9-repdigit that is a multiple of n and m, where n and m are coprime to 2 and 5.

n	a(n)
1	1
2	1
3	1
4	6
5	6
6	42
7	1
8	3
9	6
10	9
11	2
12	2
13	6
14	2
15	22
16	6
17	6
18	6
19	6
20	6
21	78
22	16
23	16
24	48
25	16
26	16
27	48
28	272
29	18
30	18
31	18
32	18
33	18
34	18
35	144
36	342
37	6
38	6
39	42
40	6
41	6
42	6
43	48
44	18
45	42
46	22
47	22
48	66
49	22
50	22
51	66
52	176
53	198
54	66
55	506
56	3
57	9
58	6
59	27
60	6
61	6
62	48
63	18
64	18
65	66
66	81
67	28
68	28
69	84
70	28
71	28
72	84
73	112
74	252
75	84
76	308
77	84
78	812

[1, 1, 1, 6, 6, 42, 1, 3, 6, 9, 2, 2, 6, 2, 22, 6, 6, 6, 6, 6, 78, 16, 16, 48, 16, 16, 48, 272, 18, 18, 18, 18, 18, 18, 144, 342, 6, 6, 42, 6, 6, 6, 48, 18, 42, 22, 22, 66, 22, 22, 66, 176, 198, 66, 506, 3, 9, 6, 27, 6, 6, 48, 18, 18, 66, 81, 28, 28, 84, 28, 28, 84, 112, 252, 84, 308, 84, 812]

cp's OEIS Frontend

A279535 Triangle read by rows: The number of digits in the smallest 9-repdigit that is a multiple of n and m, where n and m are coprime to 2 and 5.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	6
5	6
6	42
7	1
8	3
9	6
10	9
11	2
12	2
13	6
14	2
15	22
16	6
17	6
18	6
19	6
20	6
21	78
22	16
23	16
24	48
25	16
26	16
27	48
28	272
29	18
30	18
31	18
32	18
33	18
34	18
35	144
36	342
37	6
38	6
39	42
40	6
41	6
42	6
43	48
44	18
45	42
46	22
47	22
48	66
49	22
50	22
51	66
52	176
53	198
54	66
55	506
56	3
57	9
58	6
59	27
60	6
61	6
62	48
63	18
64	18
65	66
66	81
67	28
68	28
69	84
70	28
71	28
72	84
73	112
74	252
75	84
76	308
77	84
78	812

n	a(n)
1	1
2	1
3	1
4	6
5	6
6	42
7	1
8	3
9	6
10	9
11	2
12	2
13	6
14	2
15	22
16	6
17	6
18	6
19	6
20	6
21	78
22	16
23	16
24	48
25	16
26	16
27	48
28	272
29	18
30	18
31	18
32	18
33	18
34	18
35	144
36	342
37	6
38	6
39	42
40	6
41	6
42	6
43	48
44	18
45	42
46	22
47	22
48	66
49	22
50	22
51	66
52	176
53	198
54	66
55	506
56	3
57	9
58	6
59	27
60	6
61	6
62	48
63	18
64	18
65	66
66	81
67	28
68	28
69	84
70	28
71	28
72	84
73	112
74	252
75	84
76	308
77	84
78	812

n	a(n)
1	1
2	1
3	1
4	6
5	6
6	42
7	1
8	3
9	6
10	9
11	2
12	2
13	6
14	2
15	22
16	6
17	6
18	6
19	6
20	6
21	78
22	16
23	16
24	48
25	16
26	16
27	48
28	272
29	18
30	18
31	18
32	18
33	18
34	18
35	144
36	342
37	6
38	6
39	42
40	6
41	6
42	6
43	48
44	18
45	42
46	22
47	22
48	66
49	22
50	22
51	66
52	176
53	198
54	66
55	506
56	3
57	9
58	6
59	27
60	6
61	6
62	48
63	18
64	18
65	66
66	81
67	28
68	28
69	84
70	28
71	28
72	84
73	112
74	252
75	84
76	308
77	84
78	812