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.

A038344 Numbers k such that phi(k) + sigma(k) is a prime.

Table of values

n a(n)
1 1
2 8
3 9
4 32
5 36
6 50
7 100
8 225
9 242
10 484
11 512
12 578
13 729
14 800
15 900
16 1089
17 1156
18 1250
19 1936
20 2025
21 2048
22 2304
23 2312
24 2601
25 2916
26 3025
27 3872
28 4418
29 6400
30 7225
31 7744
32 8192
33 8464
34 8836
35 9216
36 10000
37 12800
38 14400
39 20000
40 20736
41 21609
42 26896
43 27556
44 31684
45 32768
46 33856
47 34322

List of values

[1, 8, 9, 32, 36, 50, 100, 225, 242, 484, 512, 578, 729, 800, 900, 1089, 1156, 1250, 1936, 2025, 2048, 2304, 2312, 2601, 2916, 3025, 3872, 4418, 6400, 7225, 7744, 8192, 8464, 8836, 9216, 10000, 12800, 14400, 20000, 20736, 21609, 26896, 27556, 31684, 32768, 33856, 34322]