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%I A160232
%S A160232 1,2,1,3,2,3,1,4,3,5,2,5,3,4,1,5
%N A160232 s(n)=the number of ways to express n as a sum of integer powers of 2 
               using each power no more than twice.
%H A160232 Mathematical problems<a href="http://projecteuler.net/index.php?section=problems&id=169">
               Problem number 169</a>
%e A160232 4=(1+1+2=2+2=4) thus s(4)=3
%Y A160232 Sequence in context: A071912 A070940 A020651 this_sequence A002487 A060162 
               A026730
%Y A160232 Adjacent sequences: A160229 A160230 A160231 this_sequence A160233 A160234 
               A160235
%K A160232 nonn
%O A160232 1,2
%A A160232 Knut Angstrom (angstrom.knut(AT)telia.com), May 04 2009, May 05 2009

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