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%I #10 Nov 18 2021 12:33:13
%S 1,0,1,0,1,1,2,2,2,2,3,3,5,4,6,5,7,7,9,9,11,11,13,13,16,16,19,19,22,
%T 22,26,26,30,30,34,35,39,40,44,45,50,51,57,57,63,64,70,72,78,80,86,88,
%U 95,97,105,107,115,117,125,128
%N Expansion of 1/((1-x^2)(1-x^5)(1-x^6)(1-x^7)).
%H <a href="/index/Rec#order_20">Index entries for linear recurrences with constant coefficients</a>, signature (0,1,0,0,1,1,0,-1,-1,0,-1,-1,0,1,1,0,0,1,0,-1).
%F a(n) = a(n-2)+a(n-5)+a(n-6)-a(n-8)-a(n-9)-a(n-11)-a(n-12)+a(n-14)+a(n-15)+a(n-18)-a(n-20). - _Wesley Ivan Hurt_, Apr 23 2021
%t CoefficientList[Series[1/((1-x^2)(1-x^5)(1-x^6)(1-x^7)), {x, 0, 100}], x] (* _Jinyuan Wang_, Mar 15 2020 *)
%t LinearRecurrence[{0,1,0,0,1,1,0,-1,-1,0,-1,-1,0,1,1,0,0,1,0,-1},{1,0,1,0,1,1,2,2,2,2,3,3,5,4,6,5,7,7,9,9},80] (* _Harvey P. Dale_, Nov 18 2021 *)
%K nonn,easy
%O 0,7
%A _N. J. A. Sloane_
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