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.

A230354 Even numbers n such that digit sum of n = digit sum of largest odd divisor of n.

Table of values

n a(n)
1 12
2 18
3 36
4 54
5 60
6 72
7 90
8 108
9 126
10 132
11 144
12 156
13 162
14 180
15 198
16 204
17 216
18 228
19 234
20 240
21 252
22 270
23 276
24 306
25 320
26 324
27 342
28 348
29 360
30 372
31 378
32 396
33 414
34 420
35 432
36 450
37 504
38 516
39 522
40 540
41 558
42 594
43 612
44 624
45 630
46 636
47 660
48 702
49 708
50 720
51 732
52 738
53 756
54 774
55 780
56 792
57 810
58 900

List of values

[12, 18, 36, 54, 60, 72, 90, 108, 126, 132, 144, 156, 162, 180, 198, 204, 216, 228, 234, 240, 252, 270, 276, 306, 320, 324, 342, 348, 360, 372, 378, 396, 414, 420, 432, 450, 504, 516, 522, 540, 558, 594, 612, 624, 630, 636, 660, 702, 708, 720, 732, 738, 756, 774, 780, 792, 810, 900]

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

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