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.
%I A180526 #11 Oct 29 2023 16:11:11
%S A180526 13,17,31,37,41,43,71,73,107,113,131,137,149,151,167,179,181,197,211,
%T A180526 233,281,283,307,313,317,331,349,353,367,379,383,397,419,439,461,463,
%U A180526 521,523,613,631,641,643,719,739,821,823,881,883,1021,1033,1039,1049
%N A180526 Primes that become a different prime under the mapping 1 <=> 3.
%H A180526 Robert Price, <a href="/A180526/b180526.txt">Table of n, a(n) for n = 1..3634</a>
%H A180526 <a href="/index/Pri#primes">Index to Primes</a>, Primes that become a different prime under some mapping.
%t A180526 fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 1] || MemberQ[id, 3]) && PrimeQ[ FromDigits[ id /. {1 -> 3, 3 -> 1}] ]]; Select[ Prime@ Range@ 300, fQ]
%Y A180526 Cf. A175770, A175791, A180517 thru A180559, A175789, A180560, A180561.
%K A180526 base,nonn
%O A180526 1,1
%A A180526 _Zak Seidov_ and _Robert G. Wilson v_, Sep 09 2010