%I A012268
%S A012268 0,0,2,6,22,100,788,8568,103416,1307808,17722512,264361680,4373968080
%N A012268 Duplicate of A009655.
%Y A012268 Sequence in context: A012270 A009585 A012267 this_sequence A009655 A002772 
               A000140
%Y A012268 Adjacent sequences: A012265 A012266 A012267 this_sequence A012269 A012270 
               A012271
%K A012268 dead
%O A012268 0,3