%I A011780
%S A011780 1,6,26,92,291,850,2348,6216,15925,39742,97086,233012,550983,
%T A011780 1286442,2970960,6796320,15417945,34719510,77672290,172743180,
%U A011780 382147691,841346306,1844250996,4026531832,8758949501,18989322990
%N A011780 Expansion of 1/(1-2*x)^3/(1-x^2)^2.
%Y A011780 Sequence in context: A166214 A032169 A032196 this_sequence A036631 A036638 
               A036645
%Y A011780 Adjacent sequences: A011777 A011778 A011779 this_sequence A011781 A011782 
               A011783
%K A011780 nonn
%O A011780 0,2
%A A011780 Emeric Deutsch (deutsch(AT)duke.poly.edu)