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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.

A270032 a(n) is the smallest b for which the base-b representation of n contains at least one 6 (or 0 if no such base exists).

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 7
7 0
8 0
9 0
10 0
11 0
12 0
13 7
14 8
15 9
16 10
17 11
18 12
19 13
20 7
21 15
22 8
23 17
24 9
25 19
26 10
27 7
28 11
29 23
30 8
31 25
32 13
33 9
34 7
35 29
36 10
37 31
38 8
39 11
40 17
41 7
42 7
43 7
44 7
45 7
46 7
47 7
48 7
49 8
50 8
51 8
52 8
53 8
54 8
55 7
56 9
57 9
58 9
59 9
60 9
61 9
62 7
63 10
64 10
65 10
66 10
67 10
68 10
69 7
70 8
71 11
72 11
73 11
74 11
75 11
76 7
77 12
78 8
79 12
80 12
81 12

List of values

[0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 7, 8, 9, 10, 11, 12, 13, 7, 15, 8, 17, 9, 19, 10, 7, 11, 23, 8, 25, 13, 9, 7, 29, 10, 31, 8, 11, 17, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 7, 9, 9, 9, 9, 9, 9, 7, 10, 10, 10, 10, 10, 10, 7, 8, 11, 11, 11, 11, 11, 7, 12, 8, 12, 12, 12]

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