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In the number n, replace all (decimal) digits '3' with '4' and vice versa.
1

%I #11 Mar 31 2017 00:20:38

%S 0,1,2,4,3,5,6,7,8,9,10,11,12,14,13,15,16,17,18,19,20,21,22,24,23,25,

%T 26,27,28,29,40,41,42,44,43,45,46,47,48,49,30,31,32,34,33,35,36,37,38,

%U 39,50,51,52,54,53,55,56,57,58,59,60,61,62,64,63,65,66,67,68,69,70,71,72,74,73,75

%N In the number n, replace all (decimal) digits '3' with '4' and vice versa.

%C The map which is applied to primes in A171022.

%H Vincenzo Librandi, <a href="/A222234/b222234.txt">Table of n, a(n) for n = 0..1000</a>

%t a[n_]:= IntegerDigits[n]/.{3->4, 4->3} // FromDigits; Table[a[n], {n, 0, 80}] (* _Vincenzo Librandi_, Jul 30 2013 *)

%o (PARI) A222234(n,d=[0,1,2,4,3,5,6,7,8,9])=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