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.

A227623 Numbers n such that phi(n) + pi(n) is prime.

Table of values

n a(n)
1 2
2 5
3 6
4 17
5 18
6 23
7 24
8 25
9 31
10 33
11 36
12 41
13 47
14 48
15 51
16 70
17 75
18 84
19 87
20 98
21 106
22 109
23 111
24 127
25 130
26 157
27 160
28 170
29 180
30 191
31 192
32 197
33 211
34 212
35 217
36 219
37 220
38 221
39 233
40 236
41 241
42 242
43 244
44 247
45 248
46 257
47 258
48 259
49 260
50 261
51 278
52 279
53 286
54 288
55 290
56 331
57 333

List of values

[2, 5, 6, 17, 18, 23, 24, 25, 31, 33, 36, 41, 47, 48, 51, 70, 75, 84, 87, 98, 106, 109, 111, 127, 130, 157, 160, 170, 180, 191, 192, 197, 211, 212, 217, 219, 220, 221, 233, 236, 241, 242, 244, 247, 248, 257, 258, 259, 260, 261, 278, 279, 286, 288, 290, 331, 333]