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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.

A090709 Primes whose decimal representation is a valid number in base 6 and interpreted as such is again a prime.

Table of values

n a(n)
1 2
2 3
3 5
4 11
5 31
6 101
7 151
8 211
9 241
10 251
11 331
12 421
13 431
14 521
15 1021
16 1151
17 1231
18 1321
19 2011
20 2131
21 2311
22 2351
23 2441
24 2531
25 2551
26 3041
27 3221
28 3251
29 3301
30 3541
31 4021
32 4111
33 4201
34 4421
35 4441
36 4451
37 5011
38 5021
39 5101
40 5231
41 5441
42 5531
43 10331
44 11131
45 11311

List of values

[2, 3, 5, 11, 31, 101, 151, 211, 241, 251, 331, 421, 431, 521, 1021, 1151, 1231, 1321, 2011, 2131, 2311, 2351, 2441, 2531, 2551, 3041, 3221, 3251, 3301, 3541, 4021, 4111, 4201, 4421, 4441, 4451, 5011, 5021, 5101, 5231, 5441, 5531, 10331, 11131, 11311]

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

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