%I A022015
%S A022015 2,6,19,61,197,633,2036,6548,21061,67737,217861,700699,2253638,
%T A022015 7248306,23312507,74979305,241153657,775615161,2494587424,
%U A022015 8023265560,25804984685,82995786381,266936820209,858540765611
%N A022015 a(n)=2a(n-1)+3a(n-2)+2a(n-3)+3a(n-4).
%Y A022015 Sequence in context: A022041 A018906 A014010 this_sequence A138747 A052975 
               A035929
%Y A022015 Adjacent sequences: A022012 A022013 A022014 this_sequence A022016 A022017 
               A022018
%K A022015 nonn
%O A022015 0,1
%A A022015 R. K. Guy (rkg(AT)cpsc.ucalgary.ca)