%I #5 Mar 30 2012 18:56:41
%S 13,29,45,52,61,77,93,109,116,125,141,157,173,180,189,205,208,237,244,
%T 253,269,285,301,308,317,333,349,365,372,381,397,413,429,436,445,461,
%U 464,493,500,509,525,541,557,564,573,589,605
%N Numbers n such that string 3,1 occurs in the base 4 representation of n but not of n-1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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