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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.

A235474 Primes whose base-4 representation is also the base-5 representation of a prime.

Table of values

n a(n)
1 2
2 3
3 11
4 29
5 31
6 41
7 101
8 109
9 139
10 149
11 151
12 181
13 199
14 229
15 239
16 251
17 269
18 271
19 281
20 389
21 409
22 491
23 509
24 541
25 547
26 661
27 751
28 887
29 911
30 947
31 991
32 1021
33 1051
34 1061
35 1069
36 1091
37 1151
38 1279
39 1289
40 1381
41 1409
42 1471
43 1549
44 1709
45 1759
46 1801
47 1999

List of values

[2, 3, 11, 29, 31, 41, 101, 109, 139, 149, 151, 181, 199, 229, 239, 251, 269, 271, 281, 389, 409, 491, 509, 541, 547, 661, 751, 887, 911, 947, 991, 1021, 1051, 1061, 1069, 1091, 1151, 1279, 1289, 1381, 1409, 1471, 1549, 1709, 1759, 1801, 1999]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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