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.

A158913 Primes p such that there is a composite c with sigma(p) = sigma(c).

Table of values

n a(n)
1 11
2 17
3 23
4 31
5 41
6 47
7 53
8 59
9 71
10 79
11 83
12 89
13 97
14 103
15 107
16 113
17 127
18 131
19 139
20 151
21 167
22 179
23 181
24 191
25 223
26 227
27 233
28 239
29 251
30 263
31 269
32 271
33 293
34 307
35 311
36 359
37 383
38 389
39 419
40 431
41 433
42 439
43 443
44 449
45 467
46 479
47 491
48 503
49 521
50 557
51 569
52 571
53 587
54 593
55 599

List of values

[11, 17, 23, 31, 41, 47, 53, 59, 71, 79, 83, 89, 97, 103, 107, 113, 127, 131, 139, 151, 167, 179, 181, 191, 223, 227, 233, 239, 251, 263, 269, 271, 293, 307, 311, 359, 383, 389, 419, 431, 433, 439, 443, 449, 467, 479, 491, 503, 521, 557, 569, 571, 587, 593, 599]