%I A048773
%S A048773 1,11,32,84,209,511,1240,3000,7249,17507,42272,102060,246401,594871,
%T A048773 1436152,3467184,8370529,20208251,48787040,117782340,284351729,
%U A048773 686485807,1657323352
%N A048773 Partial sums of A048697.
%F A048773 a(n)=2*a(n-1)+a(n-2)+9; a(0)=1, a(1)=11.
%e A048773 a(n)=[ {(10+(11/2)*sqrt(2))(1+sqrt(2))^n - (10-(11/2)*sqrt(2))(1-sqrt(2))^n}/ 
               2*sqrt(2) ]-9/2.
%Y A048773 Cf. A001333, A000129, A048696, A048697.
%Y A048773 Sequence in context: A045982 A059134 A007790 this_sequence A056123 A006655 
               A018956
%Y A048773 Adjacent sequences: A048770 A048771 A048772 this_sequence A048774 A048775 
               A048776
%K A048773 easy,nice,nonn
%O A048773 0,2
%A A048773 Barry E. Williams