A268360 - cp's OEIS frontend

A268360 "Four"ier sequence: there is a unique base b >= 5 such that (n base b) contains the largest number of 4's.

n	a(n)
1	9
2	10
3	11
4	12
5	13
6	15
7	17
8	24
9	28
10	32
11	36
12	40
13	44
14	48
15	49
16	52
17	56
18	60
19	68
20	72
21	74
22	76
23	80
24	81
25	84
26	88
27	92
28	96
29	99
30	108
31	109
32	112
33	114
34	116
35	119
36	122
37	123
38	124
39	128
40	130
41	132
42	140
43	149
44	152
45	154
46	156
47	166
48	170
49	171
50	172
51	173
52	174
53	176
54	178
55	179
56	180
57	184
58	188
59	192
60	199

[9, 10, 11, 12, 13, 15, 17, 24, 28, 32, 36, 40, 44, 48, 49, 52, 56, 60, 68, 72, 74, 76, 80, 81, 84, 88, 92, 96, 99, 108, 109, 112, 114, 116, 119, 122, 123, 124, 128, 130, 132, 140, 149, 152, 154, 156, 166, 170, 171, 172, 173, 174, 176, 178, 179, 180, 184, 188, 192, 199]

cp's OEIS Frontend

A268360 "Four"ier sequence: there is a unique base b >= 5 such that (n base b) contains the largest number of 4's.

Table of values

List of values

n	a(n)
1	9
2	10
3	11
4	12
5	13
6	15
7	17
8	24
9	28
10	32
11	36
12	40
13	44
14	48
15	49
16	52
17	56
18	60
19	68
20	72
21	74
22	76
23	80
24	81
25	84
26	88
27	92
28	96
29	99
30	108
31	109
32	112
33	114
34	116
35	119
36	122
37	123
38	124
39	128
40	130
41	132
42	140
43	149
44	152
45	154
46	156
47	166
48	170
49	171
50	172
51	173
52	174
53	176
54	178
55	179
56	180
57	184
58	188
59	192
60	199

n	a(n)
1	9
2	10
3	11
4	12
5	13
6	15
7	17
8	24
9	28
10	32
11	36
12	40
13	44
14	48
15	49
16	52
17	56
18	60
19	68
20	72
21	74
22	76
23	80
24	81
25	84
26	88
27	92
28	96
29	99
30	108
31	109
32	112
33	114
34	116
35	119
36	122
37	123
38	124
39	128
40	130
41	132
42	140
43	149
44	152
45	154
46	156
47	166
48	170
49	171
50	172
51	173
52	174
53	176
54	178
55	179
56	180
57	184
58	188
59	192
60	199

n	a(n)
1	9
2	10
3	11
4	12
5	13
6	15
7	17
8	24
9	28
10	32
11	36
12	40
13	44
14	48
15	49
16	52
17	56
18	60
19	68
20	72
21	74
22	76
23	80
24	81
25	84
26	88
27	92
28	96
29	99
30	108
31	109
32	112
33	114
34	116
35	119
36	122
37	123
38	124
39	128
40	130
41	132
42	140
43	149
44	152
45	154
46	156
47	166
48	170
49	171
50	172
51	173
52	174
53	176
54	178
55	179
56	180
57	184
58	188
59	192
60	199