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%I #16 Apr 02 2024 03:55:05
%S 13,21,32,47,68,96,134,185,253,344,465,626,840,1124,1501,2001,2664,
%T 3543,4708,6252,8298,11009,14601,19360,25665,34018,45084,59744,79165,
%U 104893,138976,184127,243940,323176,428142,567193,751397,995416,1318673,1746898
%N Number of binary strings of length n with no substrings equal to 0001 0011 or 1011.
%H R. H. Hardin, <a href="/A164458/b164458.txt">Table of n, a(n) for n=4..500</a>
%H <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (2,0,-1,-1,1).
%F G.f.: -x^4*(13-5*x-10*x^2-4*x^3+8*x^4) / ( (x^3+x^2-1)*(x-1)^2 ). - _R. J. Mathar_, Jan 19 2011
%t LinearRecurrence[{2,0,-1,-1,1},{13,21,32,47,68},60] (* _Harvey P. Dale_, Sep 04 2019 *)
%K nonn,easy
%O 4,1
%A _R. H. Hardin_, Aug 14 2009
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