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.

A235717 Squares which have one or more occurrences of exactly two different digits.

Table of values

n a(n)
1 16
2 25
3 36
4 49
5 64
6 81
7 100
8 121
9 144
10 225
11 400
12 441
13 484
14 676
15 900
16 1444
17 7744
18 10000
19 11881
20 29929
21 40000
22 44944
23 55225
24 69696
25 90000
26 1000000
27 4000000
28 9000000
29 9696996
30 100000000
31 400000000
32 900000000
33 6661661161
34 10000000000
35 40000000000
36 90000000000

List of values

[16, 25, 36, 49, 64, 81, 100, 121, 144, 225, 400, 441, 484, 676, 900, 1444, 7744, 10000, 11881, 29929, 40000, 44944, 55225, 69696, 90000, 1000000, 4000000, 9000000, 9696996, 100000000, 400000000, 900000000, 6661661161, 10000000000, 40000000000, 90000000000]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.