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A164503 Number of binary strings of length n with no substrings equal to 0011 0101 or 0110 1

%I

%S 13,21,34,55,87,136,211,326,501,766,1166,1769,2676,4037,6075,9122,

%T 13671,20453,30551,45569,67881,100998,150109,222879,330625,490048,

%U 725783,1074153,1588694,2348284,3469100,5122202,7559387,11151195,16442768

%N Number of binary strings of length n with no substrings equal to 0011 0101 or 0110

%H R. H. Hardin, <a href="/A164503/b164503.txt">Table of n, a(n) for n=4..500</a>

%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1,1,0,-1,0,-1).

%F G.f. -x^4*(-13+5*x-5*x^2+5*x^3+10*x^4+4*x^5+8*x^6) / ( (x^3+x-1)*(x^4+x-1) ). - R. J. Mathar, Jan 19 2011

%t LinearRecurrence[{2,-1,1,0,-1,0,-1},{13,21,34,55,87,136,211},40] (* _Harvey P. Dale_, Sep 28 2017 *)

%K nonn

%O 4,1

%A _R. H. Hardin_ Aug 14 2009

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Last modified March 29 17:51 EDT 2023. Contains 361599 sequences. (Running on oeis4.)