%I A131185
%S A131185 0,2,1,0,1,3,0,2,1,0,1,3,0,2,1,0,1,3,0,2,1,0,1,3,0,2,1,0,1,3,
%T A131185 0,2,1,0,1,3,0,2,1,0,1,3,0,2,1,0,1,3,0,2,1,0,1,3,0,2,1,0,1,3,
%U A131185 0,2,1,0,1,3,0,2,1,0,1,3,0,2,1,0,1,3,0,2,1,0,1,3,0,2,1,0,1,3
%V A131185 0,2,-1,0,-1,3,0,2,-1,0,-1,3,0,2,-1,0,-1,3,0,2,-1,0,-1,3,0,2,-1,0,-1,3,
%W A131185 0,2,-1,0,-1,3,0,2,-1,0,-1,3,0,2,-1,0,-1,3,0,2,-1,0,-1,3,0,2,-1,0,-1,3,
%X A131185 0,2,-1,0,-1,3,0,2,-1,0,-1,3,0,2,-1,0,-1,3,0,2,-1,0,-1,3,0,2,-1,0,-1,3
%N A131185 Period 6: repeat 0, 2, -1, 0, -1, 3.
%F A131185 a(n)=(1/30)*{16*(n mod 6)-19*[(n+1) mod 6]+6*[(n+2) mod 6]-4*[(n+3) mod
6]+16*[(n+4) mod 6]-9*[(n+5) mod 6]}, with n>=0 - Paolo P. Lava (ppl(AT)spl.at),
Oct 24 2007
%F A131185 a(n)=a(n-6). G.f.: x(2-x-x^3+3x^4)/((1-x)(1+x)(1+x+x^2)(1-x+x^2)). [From
R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009]
%Y A131185 Sequence in context: A138107 A089631 A129558 this_sequence A052249 A030528
A077227
%Y A131185 Adjacent sequences: A131182 A131183 A131184 this_sequence A131186 A131187
A131188
%K A131185 sign,easy
%O A131185 0,2
%A A131185 Paul Curtz (bpcrtz(AT)free.fr), Sep 25 2007
%E A131185 More periods from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07
2009
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