%I A117452
%S A117452 1,1,1,0,0,2,1,1,0,0,2,1,1,0,0,2,1,1,0,0,2,1,1,0,0,2,1,1,0,0,2,1,1,0,0,
%T A117452 2,1,1,0,0,2,1,1,0,0,2,1,1,0,0,2,1,1,0,0,2,1,1,0,0
%V A117452 1,-1,1,0,0,2,-1,1,0,0,2,-1,1,0,0,2,-1,1,0,0,2,-1,1,0,0,2,-1,1,0,0,2,-1,
               1,0,0,2,-1,1,0,
%W A117452 0,2,-1,1,0,0,2,-1,1,0,0,2,-1,1,0,0,2,-1,1,0,0
%N A117452 Periodic{2,-1,1,0,0}-0^n.
%C A117452 Partial sums are A117451. Second partial sums are A117450.
%F A117452 G.f.: (1-x+x^2+x^5)/(1-x^5)
%F A117452 a(n)=(1/25)*{-9*(n mod 5)+[(n+1) mod 5]+6*[(n+2) mod 5]-9*[(n+3) mod 
               5]+16*[(n+4) mod 5]}+[(n+2) mod (n+1)]-1, with n>=0. - Paolo P. Lava 
               (ppl(AT)spl.at), Jul 19 2007
%Y A117452 Sequence in context: A078807 A029422 A152800 this_sequence A029412 A026921 
               A157044
%Y A117452 Adjacent sequences: A117449 A117450 A117451 this_sequence A117453 A117454 
               A117455
%K A117452 easy,sign
%O A117452 0,6
%A A117452 Paul Barry (pbarry(AT)wit.ie), Mar 16 2006