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.

A257123 Numbers n such that the decimal expansions of both n and n^2 have 2 as smallest digit and 7 as largest digit.

Table of values

n a(n)
1 275
2 2574
3 2725
4 2765
5 4762
6 5725
7 6762
8 7244
9 7262
10 23765
11 25744
12 27244
13 27325
14 27434
15 27465
16 27525
17 27632
18 27665
19 47725
20 52275
21 52376
22 52475
23 52576
24 52675
25 57242
26 67426
27 72266
28 72275
29 72424
30 72426
31 72576
32 72624
33 73325
34 73725
35 74326
36 75725
37 233725
38 233744

List of values

[275, 2574, 2725, 2765, 4762, 5725, 6762, 7244, 7262, 23765, 25744, 27244, 27325, 27434, 27465, 27525, 27632, 27665, 47725, 52275, 52376, 52475, 52576, 52675, 57242, 67426, 72266, 72275, 72424, 72426, 72576, 72624, 73325, 73725, 74326, 75725, 233725, 233744]