%I A044072
%S A044072 11,27,43,59,75,91,107,123,139,155,171,203,219,235,251,267,283,
%T A044072 299,315,331,347,363,379,395,411,427,459,475,491,507,523,539,
%U A044072 555,571,587,603,619,635,651,667,683,779,795,811,827,843,859
%N A044072 Numbers n such that string 2,3 occurs in the base 4 representation of 
               n but not of n-1.
%C A044072 Members are of form 16k+11.
%Y A044072 Sequence in context: A152574 A035701 A106839 this_sequence A044453 A137019 
               A122929
%Y A044072 Adjacent sequences: A044069 A044070 A044071 this_sequence A044073 A044074 
               A044075
%K A044072 nonn,base
%O A044072 1,1
%A A044072 Clark Kimberling (ck6(AT)evansville.edu)