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A222238 In the number n, replace all (decimal) digits '3' with '8' and vice versa. 1

%I #11 Mar 31 2017 00:18:12

%S 0,1,2,8,4,5,6,7,3,9,10,11,12,18,14,15,16,17,13,19,20,21,22,28,24,25,

%T 26,27,23,29,80,81,82,88,84,85,86,87,83,89,40,41,42,48,44,45,46,47,43,

%U 49,50,51,52,58,54,55,56,57,53,59,60,61,62,68,64,65,66,67,63,69,70,71,72,78,74,75

%N In the number n, replace all (decimal) digits '3' with '8' and vice versa.

%C The map which is applied to primes in A171044.

%H Vincenzo Librandi, <a href="/A222238/b222238.txt">Table of n, a(n) for n = 0..1000</a>

%t a[n_]:= IntegerDigits[n]/.{3->8, 8->3} // FromDigits; Table[a[n], {n, 0, 80}] (* _Vincenzo Librandi_, Jul 30 2013 *)

%o (PARI) A222238(n,d=[0, 1, 2, 8, 4, 5, 6, 7, 3, 9])={sum(i=1,#n=digits(n),d[n[i]+1]*10^(#n-i),!n*d[1])} \\ N.B.: digits(0)=[] in PA RI (v.2.6)

%Y Cf. A222210-A222254; A171013-A171016, A175770, A171018-A171057.

%K nonn,base,easy

%O 0,3

%A _M. F. Hasler_, Feb 13 2013

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