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.

A235461 Primes whose base-4 representation also is the base 2-representation of a prime.

Table of values

n a(n)
1 5
2 17
3 257
4 277
5 337
6 1093
7 1109
8 1297
9 1361
10 4357
11 5189
12 16453
13 16657
14 16661
15 17489
16 17669
17 17681
18 17749
19 21521
20 21569
21 21589
22 65537
23 65557
24 65617
25 65809
26 66821
27 70657
28 70981
29 70997
30 81937
31 82241
32 83221
33 83269
34 86017
35 86357
36 87317
37 263429
38 263489
39 267541
40 278549

List of values

[5, 17, 257, 277, 337, 1093, 1109, 1297, 1361, 4357, 5189, 16453, 16657, 16661, 17489, 17669, 17681, 17749, 21521, 21569, 21589, 65537, 65557, 65617, 65809, 66821, 70657, 70981, 70997, 81937, 82241, 83221, 83269, 86017, 86357, 87317, 263429, 263489, 267541, 278549]

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

Content is available under The OEIS End-User License Agreement.