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.

A260702 Numbers n such that 3*n and n^2 have the same digit sum.

Table of values

n a(n)
1 0
2 3
3 6
4 9
5 12
6 15
7 18
8 21
9 30
10 33
11 39
12 45
13 48
14 51
15 60
16 66
17 90
18 96
19 99
20 102
21 105
22 111
23 120
24 123
25 129
26 132
27 150
28 153
29 156
30 159
31 162
32 165
33 180
34 189
35 195
36 198
37 201
38 210
39 225
40 231
41 246
42 252
43 255
44 261
45 285
46 300
47 330
48 333
49 348
50 351
51 390
52 399
53 429
54 450
55 453
56 459
57 462

List of values

[0, 3, 6, 9, 12, 15, 18, 21, 30, 33, 39, 45, 48, 51, 60, 66, 90, 96, 99, 102, 105, 111, 120, 123, 129, 132, 150, 153, 156, 159, 162, 165, 180, 189, 195, 198, 201, 210, 225, 231, 246, 252, 255, 261, 285, 300, 330, 333, 348, 351, 390, 399, 429, 450, 453, 459, 462]