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%I #24 Nov 16 2018 22:43:15
%S 1,21,51,101,107,97,67,17,11,21,51,101,107,97,67,17,11,21,51,101,107,
%T 97,67,17,11,21,51,101,107,97,67,17,11,21,51,101,107,97,67,17,11,21,
%U 51,101,107,97,67,17,11,21,51,101,107,97,67,17,11,21,51,101,107,97,67,17,11,21,51
%N Expansion of (1 + 20*x + 30*x^2 + 50*x^3 + 7*x^4 + 10*x^5)/((1 - x)*(1 + x^4)).
%C After the first term, the sequence is periodic with period 8: repeat {21, 51, 101, 107, 97, 67, 17, 11}.
%H <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,-1,1).
%F G.f.: (1 + 20*x + 30*x^2 + 50*x^3 + 7*x^4 + 10*x^5)/((1 - x)*(1 + x^4)).
%t CoefficientList[Series[(1 + 20 x + 30 x^2 + 50 x^3 + 7 x^4 + 10 x^5)/((1 - x) (1 + x^4)), {x, 0, 100}], x]
%K nonn,easy
%O 0,2
%A _Shara Lalo_, May 23 2018