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.

A385640 Numbers k such that the sum of the digits of k divides k and the sum of the digits of k^2 divides k^2.

Table of values

n a(n)
1 1
2 2
3 3
4 6
5 9
6 10
7 12
8 18
9 20
10 21
11 24
12 30
13 36
14 42
15 45
16 48
17 54
18 60
19 63
20 72
21 80
22 84
23 90
24 100
25 102
26 108
27 110
28 111
29 112
30 117
31 120
32 126
33 132
34 140
35 144
36 150
37 156
38 162
39 180
40 190
41 198
42 200
43 201
44 204
45 207
46 210
47 216
48 220
49 234
50 240
51 243
52 252
53 264
54 270
55 288
56 300
57 306
58 315

List of values

[1, 2, 3, 6, 9, 10, 12, 18, 20, 21, 24, 30, 36, 42, 45, 48, 54, 60, 63, 72, 80, 84, 90, 100, 102, 108, 110, 111, 112, 117, 120, 126, 132, 140, 144, 150, 156, 162, 180, 190, 198, 200, 201, 204, 207, 210, 216, 220, 234, 240, 243, 252, 264, 270, 288, 300, 306, 315]

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

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