%I A044074
%S A044074 13,29,45,52,61,77,93,109,116,125,141,157,173,180,189,205,208,
%T A044074 237,244,253,269,285,301,308,317,333,349,365,372,381,397,413,
%U A044074 429,436,445,461,464,493,500,509,525,541,557,564,573,589,605
%N A044074 Numbers n such that string 3,1 occurs in the base 4 representation of 
               n but not of n-1.
%Y A044074 Sequence in context: A045472 A141293 A120827 this_sequence A044455 A082285 
               A153422
%Y A044074 Adjacent sequences: A044071 A044072 A044073 this_sequence A044075 A044076 
               A044077
%K A044074 nonn,base
%O A044074 1,1
%A A044074 Clark Kimberling (ck6(AT)evansville.edu)