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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.

A235354 Minimal k > 1 such that the base-k representation of the n-th prime, read in decimal, is also prime.

Table of values

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

List of values

[3, 2, 2, 4, 4, 4, 4, 4, 2, 4, 7, 4, 5, 4, 2, 4, 7, 4, 3, 4, 4, 3, 4, 2, 4, 2, 3, 4, 4, 4, 6, 4, 8, 3, 2, 4, 2, 2, 4, 2, 2, 3, 4, 3, 4, 2, 3, 8, 4, 2, 4, 7, 4, 4, 8, 10, 10, 9, 3, 5, 3, 4, 3, 4, 2, 4, 2, 6, 10, 3, 7, 4, 2, 3, 2, 2, 4, 10, 4, 3, 4, 3, 10, 3, 3]

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