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In the number n, replace all (decimal) digits '2' with '8' and vice versa.
1

%I #12 Mar 31 2017 00:21:49

%S 0,1,8,3,4,5,6,7,2,9,10,11,18,13,14,15,16,17,12,19,80,81,88,83,84,85,

%T 86,87,82,89,30,31,38,33,34,35,36,37,32,39,40,41,48,43,44,45,46,47,42,

%U 49,50,51,58,53,54,55,56,57,52,59,60,61,68,63,64,65,66,67,62,69

%N In the number n, replace all (decimal) digits '2' with '8' and vice versa.

%C The map which is applied to primes in A171043.

%H Vincenzo Librandi, <a href="/A222232/b222232.txt">Table of n, a(n) for n = 0..1000</a>

%t a[n_]:= IntegerDigits[n]/.{2->8, 8->2} // FromDigits; Table[a[n], {n, 0, 80}] (* _Vincenzo Librandi_, Jul 30 2013 *)

%o (PARI) A222232(n,d=[0,1,8,3,4,5,6,7,2,9])=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 Cf. A222210-A222254; A171013-A171016, A175770, A171018-A171057.

%K nonn,base,easy

%O 0,3

%A _M. F. Hasler_, Feb 12 2013