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.

A272553 Numbers n whose sum of divisors equals the sum of divisors of 2n+1.

Table of values

n a(n)
1 20
2 464
3 650
4 2744
5 3980
6 5504
7 5736
8 5922
9 7032
10 8130
11 10472
12 18618
13 24312
14 27654
15 38874
16 39500
17 43032
18 45492
19 56870
20 64410
21 71058
22 79068
23 85158
24 89178
25 92130
26 97014
27 109928
28 117114
29 118902
30 127688
31 130304
32 175554
33 180438
34 187304
35 188292
36 208452
37 224058
38 244674
39 249788
40 269192
41 294380
42 305624
43 347964

List of values

[20, 464, 650, 2744, 3980, 5504, 5736, 5922, 7032, 8130, 10472, 18618, 24312, 27654, 38874, 39500, 43032, 45492, 56870, 64410, 71058, 79068, 85158, 89178, 92130, 97014, 109928, 117114, 118902, 127688, 130304, 175554, 180438, 187304, 188292, 208452, 224058, 244674, 249788, 269192, 294380, 305624, 347964]