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.

A171021 In the sequence of prime numbers, replace all the '4' digits with '2' and vice versa.

Table of values

n a(n)
1 4
2 3
3 5
4 7
5 11
6 13
7 17
8 19
9 43
10 49
11 31
12 37
13 21
14 23
15 27
16 53
17 59
18 61
19 67
20 71
21 73
22 79
23 83
24 89
25 97
26 101
27 103
28 107
29 109
30 113
31 147
32 131
33 137
34 139
35 129
36 151
37 157
38 163
39 167
40 173
41 179
42 181
43 191
44 193
45 197
46 199
47 411
48 443
49 447
50 449
51 433
52 439
53 421
54 451
55 457
56 463

List of values

[4, 3, 5, 7, 11, 13, 17, 19, 43, 49, 31, 37, 21, 23, 27, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 147, 131, 137, 139, 129, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 411, 443, 447, 449, 433, 439, 421, 451, 457, 463]