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.

A217105 Minimal number (in decimal representation) with n nonprime substrings in base-5 representation (substrings with leading zeros are considered to be nonprime).

Table of values

n a(n)
0 2
1 1
2 5
3 6
4 27
5 25
6 34
7 127
8 128
9 125
10 170
11 636
12 632
13 627
14 625
15 850
16 3162
17 3137
18 3132
19 3127
20 3125
21 4250
22 15686
23 15661
24 15638
25 15632
26 15627
27 15625
28 21250
29 78192
30 78163
31 78162
32 78137
33 78132
34 78127
35 78125
36 106250
37 390818
38 390692
39 390686
40 390662
41 390638
42 390632

List of values

[2, 1, 5, 6, 27, 25, 34, 127, 128, 125, 170, 636, 632, 627, 625, 850, 3162, 3137, 3132, 3127, 3125, 4250, 15686, 15661, 15638, 15632, 15627, 15625, 21250, 78192, 78163, 78162, 78137, 78132, 78127, 78125, 106250, 390818, 390692, 390686, 390662, 390638, 390632]