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 A180557 #11 Oct 30 2023 17:12:26
%S A180557 67,97,163,167,193,197,263,293,367,397,461,491,563,593,607,641,647,
%T A180557 653,661,677,683,907,941,947,953,977,983,991,1061,1063,1091,1093,1163,
%U A180557 1193,1567,1597,1601,1607,1613,1663,1667,1901,1907,1913,1993,1997,2267,2297
%N A180557 Primes that become a different prime under the mapping 6 <=> 9.
%H A180557 Robert Price, <a href="/A180557/b180557.txt">Table of n, a(n) for n = 1..2828</a>
%H A180557 <a href="/index/Pri#primes">Index to Primes</a>, Primes that become a different prime under some mapping.
%t A180557 fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 6] || MemberQ[id, 9]) && PrimeQ[ FromDigits[ id /. {6 -> 9, 9 -> 6}] ]]; Select[ Prime@ Range@ 350, fQ]
%Y A180557 Cf. A171055, A175791, A180517 thru A180559, A175789, A180560, A180561.
%K A180557 base,nonn
%O A180557 1,1
%A A180557 _Zak Seidov_ and _Robert G. Wilson v_, Sep 09 2010