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 A180546 #11 Oct 30 2023 17:11:54
%S A180546 43,53,241,251,349,359,409,421,457,463,487,499,509,521,547,563,587,
%T A180546 599,643,653,1249,1259,1423,1453,1459,1471,1483,1523,1543,1549,1571,
%U A180546 1583,2143,2153,2341,2347,2351,2357,2441,2447,2459,2549,2551,2557,2647,2657
%N A180546 Primes that become a different prime under the mapping 4 <=> 5.
%H A180546 Robert Price, <a href="/A180546/b180546.txt">Table of n, a(n) for n = 1..2141</a>
%H A180546 <a href="/index/Pri#primes">Index to Primes</a>, Primes that become a different prime under some mapping.
%t A180546 fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 4] || MemberQ[id, 5]) && PrimeQ[ FromDigits[ id /. {4 -> 5, 5 -> 4}] ]]; Select[ Prime@ Range@ 400, fQ]
%Y A180546 Cf. A171027, A175791, A180517 thru A180559, A175789, A180560, A180561.
%K A180546 base,nonn
%O A180546 1,1
%A A180546 _Zak Seidov_ and _Robert G. Wilson v_, Sep 09 2010