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%I #11 Feb 22 2024 20:32:12
%S 3,4,6,8,15,20,21,27,28,30,33,36,39,40,42,44,48,51,52,54,56,57,64,66,
%T 68,69,72,75,76,78,87,88,92,93,96,100,102,104,105,111,114,116,123,124,
%U 128,129,135,136,138,140,141,147,148,150,152,159,164,165,172
%N Complement of A325431.
%C These are the numbers 3x and 4x as x ranges through the numbers x > 1 in A325431.
%C Equivalently, numbers k whose exponent of the highest power of 3 dividing k and exponent of the highest power of 4 dividing k have an opposite parity. The asymptotic density of this sequence is 7/20. - _Amiram Eldar_, Sep 20 2020
%H Clark Kimberling, <a href="/A325432/b325432.txt">Table of n, a(n) for n = 1..10000</a>
%t a = {1}; Do[AppendTo[a, NestWhile[# + 1 &, Last[a] + 1, Apply[Or,
%t Map[MemberQ[a, #] &, Select[Flatten[{#/3, #/4}],
%t IntegerQ]]] &]], {150}]; a (* A325431 *)
%t Complement[Range[Last[a]], a] (* A325432 *)
%t (* _Peter J. C. Moses_, Apr 25 2019 *)
%t Select[Range[100], !Equal @@ Mod[IntegerExponent[#, {3, 4}], 2] &] (* _Amiram Eldar_, Sep 20 2020 *)
%Y Cf. A325417, A325431.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, May 01 2019
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