%I A123824
%S A123824 1,16,697,34958,1947321,114675898,7026150623,443114008903
%N A123824 Number of ways, counted up to symmetry, to build a contiguous building 
               with n LEGO blocks of size 2x3.
%D A123824 M. Abrahamsen and S. Eilers, Efficient counting of LEGO buildings, in 
               preparation
%D A123824 B. Durhuus and S. Eilers, On the entropy of LEGO, arXiv:math.CO/0504039
%H A123824 S. Eilers, <a href="http://www.math.ku.dk/~eilers/lcounts.html">LEGO 
               counts</a>
%Y A123824 Sequence in context: A014733 A053907 A036513 this_sequence A062206 A086701 
               A159375
%Y A123824 Adjacent sequences: A123821 A123822 A123823 this_sequence A123825 A123826 
               A123827
%K A123824 nonn,hard
%O A123824 1,2
%A A123824 Soren Eilers (eilers(AT)math.ku.dk), Oct 29 2006