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 A171043 #15 Mar 31 2017 00:53:53
%S A171043 8,3,5,7,11,13,17,19,83,89,31,37,41,43,47,53,59,61,67,71,73,79,23,29,
%T A171043 97,101,103,107,109,113,187,131,137,139,149,151,157,163,167,173,179,
%U A171043 121,191,193,197,199,811,883,887,889,833,839,841,851,857,863
%N A171043 In the sequence of prime numbers, replace all the '8' digits with '2' and vice versa.
%H A171043 Vincenzo Librandi, <a href="/A171043/b171043.txt">Table of n, a(n) for n = 1..1000</a>
%t A171043 FromDigits[IntegerDigits[#]/.{8->p,2->q}/.{p->2,q->8}]&/@ Prime[ Range[60]] (* _Harvey P. Dale_, Nov 30 2011 *)
%o A171043 (PARI) a(n)=my(v=[0,1,8,3,4,5,6,7,2,9]);subst(Pol(apply(k->v[k+1], digits(prime(n)))),'x,10) \\ _Charles R Greathouse IV_, Jul 26 2013
%K A171043 nonn,base,easy
%O A171043 1,1
%A A171043 _N. J. A. Sloane_ and _Vincenzo Librandi_, Sep 04 2010