%I A130131
%S A130131 1,1,1,2,3,6,11,23,47,105,231,532,1224,2872
%N A130131 Number of n-lobsters.
%H A130131 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Lobster.html">Lobster</a>
%Y A130131 Cf. A000055, A130132.
%Y A130131 Sequence in context: A001190 A036656 A090344 this_sequence A123465 A000055 
               A006787
%Y A130131 Adjacent sequences: A130128 A130129 A130130 this_sequence A130132 A130133 
               A130134
%K A130131 nonn,more
%O A130131 1,4
%A A130131 Eric Weisstein (eric(AT)weisstein.com), May 11, 2007