%I A048746
%S A048746 1,6,17,44,109,266,645,1560,3769,9102,21977,53060,128101,309266,746637,
%T A048746 1802544,4351729,10506006,25363745,61233500,147830749,356895002,
%U A048746 861620757,2080136520,5021893801,12123924126
%N A048746 Partial sums of A048655.
%F A048746 a(n)=2*a(n-1)+a(n-2)+4; a(0)=1, a(1)=6.
%F A048746 a(n)=[ {(5+3*sqrt(2))(1+sqrt(2)^n - (5-3*sqrt(2))(1-sqrt(2))^n}/2*sqrt(2) 
               ]-2
%Y A048746 Sequence in context: A099858 A062020 A066183 this_sequence A026382 A054492 
               A128525
%Y A048746 Adjacent sequences: A048743 A048744 A048745 this_sequence A048747 A048748 
               A048749
%K A048746 easy,nonn
%O A048746 0,2
%A A048746 Barry E. Williams
%E A048746 Corrected and extended by T. D. Noe (noe(AT)sspectra.com), Nov 07 2006