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Numbers whose base-5 and base-9 expansions have no digits in common.
1

%I #12 Jun 20 2021 08:29:20

%S 5,6,7,8,10,12,13,14,15,17,18,19,20,21,23,24,25,26,29,30,31,32,34,35,

%T 36,40,41,42,43,50,51,52,53,57,58,59,60,61,62,63,64,67,68,69,70,71,72,

%U 73,76,77,78,79,80,87,88,89,95,97,98,99,100,104

%N Numbers whose base-5 and base-9 expansions have no digits in common.

%H Vincenzo Librandi, <a href="/A037361/b037361.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Range[200],Intersection[IntegerDigits[#,5],IntegerDigits[#,9]]=={}&] (* _Vincenzo Librandi_, Jun 08 2012 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_