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%I #9 Jun 13 2015 00:53:14
%S 13,21,36,62,105,178,303,516,878,1494,2543,4329,7369,12544,21354,
%T 36352,61884,105349,179343,305309,519751,884813,1506288,2564276,
%U 4365376,7431537,12651316,21537377,36664853,62417606,106258647,180892877
%N Number of binary strings of length n with no substrings equal to 0000 0011 or 1100
%H R. H. Hardin, <a href="/A164430/b164430.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 (1,1,1,0,-1,-1,-1).
%F G.f. -x^4*(-13-8*x-2*x^2+8*x^3+14*x^4+12*x^5+8*x^6)/(1-x-x^2-x^3+x^5+x^6+x^7). - R. J. Mathar, Jan 19 2011
%K nonn
%O 4,1
%A _R. H. Hardin_ Aug 14 2009
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