Search: id:A015603
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%I A015603
%S A015603 0,1,11,130,1529,17989,211640,2489941,29294111,344644690,4054738589,
%T A015603 47703926689,561235840880,6602929589881,77683348056611,
%U A015603 913943194931650,10752525276757649,126503266798718989
%N A015603 a(n) = 11 a(n-1) + 9 a(n-2).
%F A015603 a(n)=-(1/157)*sqrt(157)*[11/2-(1/2)*sqrt(157)]^n+(1/157)*sqrt(157)*[11/
               2+(1/2)*sqrt(157)]^n, with n>=0 - Paolo P. Lava (ppl(AT)spl.at), 
               Jul 09 2008
%F A015603 G.f.:1/(1-11*x-9*x^2) . [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), 
               Apr 27 2009]
%o A015603 (Other) sage: [lucas_number1(n,11,-9) for n in xrange(0, 18)]# [From 
               Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 27 2009]
%Y A015603 Sequence in context: A015601 A024144 A015602 this_sequence A157718 A046210 
               A100757
%Y A015603 Adjacent sequences: A015600 A015601 A015602 this_sequence A015604 A015605 
               A015606
%K A015603 nonn,easy
%O A015603 0,3
%A A015603 Olivier Gerard (olivier.gerard(AT)gmail.com)

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