cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A068953 Number of bases B (2 <= B <= n) such that every digit of n in base B is 0 or 1.

Table of values

n a(n)
1 0
2 1
3 2
4 3
5 3
6 3
7 3
8 3
9 4
10 4
11 3
12 4
13 4
14 3
15 3
16 4
17 4
18 3
19 3
20 4
21 4
22 3
23 3
24 3
25 4
26 4
27 4
28 4
29 3
30 5
31 5
32 3
33 3
34 3
35 3
36 5
37 5
38 3
39 4
40 4
41 3
42 4
43 4
44 3
45 3
46 3
47 3
48 3
49 4
50 4
51 3
52 3
53 3
54 3
55 3
56 4
57 4
58 3
59 3
60 3
61 3
62 3
63 3
64 5
65 5
66 3
67 3
68 4
69 4
70 3
71 3
72 4
73 4
74 3
75 3
76 3
77 3
78 3
79 3
80 4
81 6
82 5
83 3
84 5
85 5
86 3
87 3
88 3
89 3
90 5
91 5
92 3
93 4
94 4
95 3
96 3
97 3
98 3
99 3
100 4
101 4
102 3
103 3

List of values

[0, 1, 2, 3, 3, 3, 3, 3, 4, 4, 3, 4, 4, 3, 3, 4, 4, 3, 3, 4, 4, 3, 3, 3, 4, 4, 4, 4, 3, 5, 5, 3, 3, 3, 3, 5, 5, 3, 4, 4, 3, 4, 4, 3, 3, 3, 3, 3, 4, 4, 3, 3, 3, 3, 3, 4, 4, 3, 3, 3, 3, 3, 3, 5, 5, 3, 3, 4, 4, 3, 3, 4, 4, 3, 3, 3, 3, 3, 3, 4, 6, 5, 3, 5, 5, 3, 3, 3, 3, 5, 5, 3, 4, 4, 3, 3, 3, 3, 3, 4, 4, 3, 3]