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.

A217107 Minimal number (in decimal representation) with n nonprime substrings in base-7 representation (substrings with leading zeros are considered to be nonprime).

Table of values

n a(n)
0 2
1 1
2 7
3 8
4 51
5 49
6 57
7 353
8 345
9 343
10 400
11 2417
12 2411
13 2403
14 2401
15 9604
16 16880
17 16823
18 16829
19 16809
20 16807
21 67228
22 117763
23 117721
24 117666
25 117659
26 117651
27 117649
28 470596
29 823709
30 823664
31 823615
32 823560
33 823553
34 823545
35 823543
36 3294172
37 5765310
38 5765063

List of values

[2, 1, 7, 8, 51, 49, 57, 353, 345, 343, 400, 2417, 2411, 2403, 2401, 9604, 16880, 16823, 16829, 16809, 16807, 67228, 117763, 117721, 117666, 117659, 117651, 117649, 470596, 823709, 823664, 823615, 823560, 823553, 823545, 823543, 3294172, 5765310, 5765063]