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.

A117570 Numbers of the form k * (sum of digits of k) listed sorted with multiplicity.

Table of values

n a(n)
1 0
2 1
3 4
4 9
5 10
6 16
7 22
8 25
9 36
10 36
11 40
12 49
13 52
14 63
15 64
16 70
17 81
18 88
19 90
20 90
21 100
22 112
23 115
24 124
25 136
26 144
27 160
28 160
29 162
30 175
31 190
32 198
33 202
34 205
35 208
36 220
37 238
38 243
39 250
40 252
41 280
42 280
43 301
44 306
45 306
46 319
47 324
48 333
49 352
50 360
51 360
52 364
53 370
54 400
55 405
56 412
57 418
58 424

List of values

[0, 1, 4, 9, 10, 16, 22, 25, 36, 36, 40, 49, 52, 63, 64, 70, 81, 88, 90, 90, 100, 112, 115, 124, 136, 144, 160, 160, 162, 175, 190, 198, 202, 205, 208, 220, 238, 243, 250, 252, 280, 280, 301, 306, 306, 319, 324, 333, 352, 360, 360, 364, 370, 400, 405, 412, 418, 424]

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

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