%I A028445
%S A028445 2,4,6,10,16,24,36,56,80,118,174,254,378,554,802,1168,1716,2502,3650,
%T A028445 5324,7754,11320,16502,24054,35058,51144,74540,108664
%N A028445 Number of cube-free words of length n on two letters.
%H A028445 A. E. Edlin, <a href="http://www.math.temple.edu/~anne/cubefree.html">
               Cube-free words</a>
%H A028445 K. Jarhumaki and J. Shallit, <a href="http://arXiv.org/abs/math.CO/0304095">
               Polynomial vs Exponential Growth in Repetition-Free Binary Words</
               a>
%H A028445 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               CubefreeWord.html">Link to a section of The World of Mathematics.</
               a>
%Y A028445 Cf. A038952, A007777, A082379, A082380.
%Y A028445 Sequence in context: A137414 A098151 A132002 this_sequence A006305 A067247 
               A017985
%Y A028445 Adjacent sequences: A028442 A028443 A028444 this_sequence A028446 A028447 
               A028448
%K A028445 nonn
%O A028445 1,1
%A A028445 Anne Edlin (anne(AT)euclid.math.temple.edu)