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 A222245 #11 Mar 30 2017 22:42:21
%S A222245 0,1,2,3,4,6,5,7,8,9,10,11,12,13,14,16,15,17,18,19,20,21,22,23,24,26,
%T A222245 25,27,28,29,30,31,32,33,34,36,35,37,38,39,40,41,42,43,44,46,45,47,48,
%U A222245 49,60,61,62,63,64,66,65,67,68,69,50,51,52,53,54,56,55,57,58,59,70,71,72,73,74,76
%N A222245 In the number n, replace all (decimal) digits '5' with '6' and vice versa.
%C A222245 The map which is applied to primes in A171033.
%H A222245 Vincenzo Librandi, <a href="/A222245/b222245.txt">Table of n, a(n) for n = 0..1000</a>
%t A222245 a[n_]:= IntegerDigits[n]/.{5->6, 6->5} // FromDigits; Table[a[n], {n, 0, 80}] (* _Vincenzo Librandi_, Jul 31 2013 *)
%o A222245 (PARI) A222245(n,d=[0, 1, 2, 3, 4, 6, 5, 7, 8, 9])=sum(i=1,#n=digits(n),d[n[i]+1]*10^(#n-i),!n*d[1]) \\ N.B.: digits(0)=[] in PARI (v.2.6)
%Y A222245 Cf. A222210-A222254; A171013-A171016, A175770, A171018-A171057.
%K A222245 nonn,base,easy
%O A222245 0,3
%A A222245 _M. F. Hasler_, Feb 13 2013