|
%I #10 Mar 31 2017 00:23:14
%S 0,1,5,3,4,2,6,7,8,9,10,11,15,13,14,12,16,17,18,19,50,51,55,53,54,52,
%T 56,57,58,59,30,31,35,33,34,32,36,37,38,39,40,41,45,43,44,42,46,47,48,
%U 49,20,21,25,23,24,22,26,27,28,29,60,61,65,63,64,62,66,67
%N In the number n, replace all (decimal) digits '2' with '5' and vice versa.
%C The map which is applied to primes in A171025.
%H Vincenzo Librandi, <a href="/A222229/b222229.txt">Table of n, a(n) for n = 0..1000</a>
%t a[n_]:= IntegerDigits[n]/.{2->5, 5->2} // FromDigits; Table[a[n], {n, 0, 80} (* _Vincenzo Librandi_, Jul 30 2013 *)
%o (PARI) A222229(n,d=[0,1,5,3,4,2,6,7,8,9])=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
|
