A125134 - cp's OEIS frontend

A125134 "Brazilian" numbers ("les nombres brésiliens" in French): numbers n such that there is a natural number b with 1 < b < n-1 such that the representation of n in base b has all equal digits.

n	a(n)
1	7
2	8
3	10
4	12
5	13
6	14
7	15
8	16
9	18
10	20
11	21
12	22
13	24
14	26
15	27
16	28
17	30
18	31
19	32
20	33
21	34
22	35
23	36
24	38
25	39
26	40
27	42
28	43
29	44
30	45
31	46
32	48
33	50
34	51
35	52
36	54
37	55
38	56
39	57
40	58
41	60
42	62
43	63
44	64
45	65
46	66
47	68
48	69
49	70
50	72
51	73
52	74
53	75
54	76
55	77
56	78
57	80
58	81
59	82
60	84
61	85
62	86
63	87
64	88
65	90

[7, 8, 10, 12, 13, 14, 15, 16, 18, 20, 21, 22, 24, 26, 27, 28, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 42, 43, 44, 45, 46, 48, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 73, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90]

cp's OEIS Frontend

A125134 "Brazilian" numbers ("les nombres brésiliens" in French): numbers n such that there is a natural number b with 1 < b < n-1 such that the representation of n in base b has all equal digits.

Table of values

List of values

n	a(n)
1	7
2	8
3	10
4	12
5	13
6	14
7	15
8	16
9	18
10	20
11	21
12	22
13	24
14	26
15	27
16	28
17	30
18	31
19	32
20	33
21	34
22	35
23	36
24	38
25	39
26	40
27	42
28	43
29	44
30	45
31	46
32	48
33	50
34	51
35	52
36	54
37	55
38	56
39	57
40	58
41	60
42	62
43	63
44	64
45	65
46	66
47	68
48	69
49	70
50	72
51	73
52	74
53	75
54	76
55	77
56	78
57	80
58	81
59	82
60	84
61	85
62	86
63	87
64	88
65	90

n	a(n)
1	7
2	8
3	10
4	12
5	13
6	14
7	15
8	16
9	18
10	20
11	21
12	22
13	24
14	26
15	27
16	28
17	30
18	31
19	32
20	33
21	34
22	35
23	36
24	38
25	39
26	40
27	42
28	43
29	44
30	45
31	46
32	48
33	50
34	51
35	52
36	54
37	55
38	56
39	57
40	58
41	60
42	62
43	63
44	64
45	65
46	66
47	68
48	69
49	70
50	72
51	73
52	74
53	75
54	76
55	77
56	78
57	80
58	81
59	82
60	84
61	85
62	86
63	87
64	88
65	90

n	a(n)
1	7
2	8
3	10
4	12
5	13
6	14
7	15
8	16
9	18
10	20
11	21
12	22
13	24
14	26
15	27
16	28
17	30
18	31
19	32
20	33
21	34
22	35
23	36
24	38
25	39
26	40
27	42
28	43
29	44
30	45
31	46
32	48
33	50
34	51
35	52
36	54
37	55
38	56
39	57
40	58
41	60
42	62
43	63
44	64
45	65
46	66
47	68
48	69
49	70
50	72
51	73
52	74
53	75
54	76
55	77
56	78
57	80
58	81
59	82
60	84
61	85
62	86
63	87
64	88
65	90