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.

A163122 Composite numbers for which the sum of proper divisors equals the sum of the digit-reversed proper divisors.

Table of values

n a(n)
1 4
2 6
3 8
4 9
5 10
6 12
7 14
8 15
9 16
10 18
11 21
12 22
13 25
14 27
15 33
16 35
17 44
18 49
19 55
20 66
21 77
22 88
23 99
24 121
25 202
26 242
27 262
28 302
29 303
30 362
31 363
32 382
33 393
34 403
35 404
36 453
37 484
38 505
39 524
40 543
41 573
42 605
43 606
44 626
45 655
46 689
47 706
48 707
49 726
50 746
51 755
52 766
53 783
54 786
55 808
56 840
57 847
58 905

List of values

[4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 21, 22, 25, 27, 33, 35, 44, 49, 55, 66, 77, 88, 99, 121, 202, 242, 262, 302, 303, 362, 363, 382, 393, 403, 404, 453, 484, 505, 524, 543, 573, 605, 606, 626, 655, 689, 706, 707, 726, 746, 755, 766, 783, 786, 808, 840, 847, 905]

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

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