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 A222225 #10 Mar 31 2017 00:24:41
%S A222225 0,8,2,3,4,5,6,7,1,9,80,88,82,83,84,85,86,87,81,89,20,28,22,23,24,25,
%T A222225 26,27,21,29,30,38,32,33,34,35,36,37,31,39,40,48,42,43,44,45,46,47,41,
%U A222225 49,50,58,52,53,54,55,56,57,51,59,60,68,62,63,64,65,66,67,61,69,70,78,72,73,74,75
%N A222225 In the number n, replace all (decimal) digits '1' with '8' and vice versa.
%C A222225 The map which is applied to primes in A171042.
%H A222225 Vincenzo Librandi, <a href="/A222225/b222225.txt">Table of n, a(n) for n = 0..1000</a>
%t A222225 a[n_]:= IntegerDigits[n]/.{1->8, 8->1} // FromDigits; Table[a[n], {n, 0, 80}] (* _Vincenzo Librandi_, Jul 30 2013 *)
%o A222225 (PARI) A222225(n,d=[0,8,2,3,4,5,6,7,1,9])=sum(i=1, #n=digits(n), d[n[i]+1]*10^(#n-i)) \\ gives correct value for n=0 iff d[1]=0, since digits(0)=[] in PARI (v.2.6)
%Y A222225 Cf. A222210-A222254; A171013-A171016, A175770, A171018-A171057.
%K A222225 nonn,base,easy
%O A222225 0,2
%A A222225 _M. F. Hasler_, Feb 12 2013