A222247 - OEIS

%I #10 Mar 30 2017 22:41:16

%S 0,1,2,3,4,8,6,7,5,9,10,11,12,13,14,18,16,17,15,19,20,21,22,23,24,28,

%T 26,27,25,29,30,31,32,33,34,38,36,37,35,39,40,41,42,43,44,48,46,47,45,

%U 49,80,81,82,83,84,88,86,87,85,89,60,61,62,63,64,68,66,67,65,69,70,71,72,73,74,78

%N In the number n, replace all (decimal) digits '5' with '8' and vice versa.

%C The map which is applied to primes in A171046.

%H Vincenzo Librandi, <a href="/A222247/b222247.txt">Table of n, a(n) for n = 0..1000</a>

%t a[n_]:= IntegerDigits[n]/.{5->8, 8->5} // FromDigits; Table[a[n], {n, 0, 80}] (* _Vincenzo Librandi_, Jul 31 2013 *)

%o (PARI) A222247(n,d=[0, 1, 2, 3, 4, 8, 6, 7, 5, 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 Cf. A222210-A222254; A171013-A171016, A175770, A171018-A171057.

%K nonn,base,easy

%O 0,3

%A _M. F. Hasler_, Feb 13 2013