Search: id:A117451
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%I A117451
%S A117451 1,0,1,1,1,3,2,3,3,3,5,4,5,5,5,7,6,7,7,7,9,8,9,9,9,11,10,11,11,11,13,12,
%T A117451 13,13,13,15,14,15,15,15,17,16,17,17,17,19,18,19,19,19,21,20,21,21,21,
%U A117451 23,22,23,23,23,25,24,25,25,25,27,26,27,27,27,29,28,29,29,29,31,30,31
%N A117451 Expansion of (1-x+x^2+x^5)/((1-x)(1-x^5)).
%C A117451 Partial sums are A117450. Partial sums of A117452.
%F A117451 a(n)=a(n-1)+a(n-5)-a(n-6); a(n)=-1+(1/2+sqrt(5)/10)cos(4*pi*n/5)-sqrt(1/
               50-sqrt(5)/250)*sin(4*pi*n/5) +(1/2-sqrt(5)/10)*cos(2*pi*n/5)+sqrt(1/
               50+sqrt(5)/250)*sin(2*pi*n/5)+(2n+5)/5.
%Y A117451 Sequence in context: A098726 A065801 A086920 this_sequence A130970 A144733 
               A091460
%Y A117451 Adjacent sequences: A117448 A117449 A117450 this_sequence A117452 A117453 
               A117454
%K A117451 easy,nonn
%O A117451 0,6
%A A117451 Paul Barry (pbarry(AT)wit.ie), Mar 16 2006

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