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A164426 Number of binary strings of length n with no substrings equal to 0000 0011 or 0101 1
13, 21, 34, 53, 81, 124, 188, 282, 422, 630, 936, 1387, 2053, 3033, 4473, 6591, 9704, 14274, 20983, 30832, 45283, 66481, 97576, 143181, 210054, 308108, 451874, 662642, 971620, 1424557, 2088498, 3061702, 4488192, 6579052, 9643637, 14135346 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

LINKS

R. H. Hardin, Table of n, a(n) for n=4..500

Index entries for linear recurrences with constant coefficients, signature (1,0,2,0,-1,-1,-1).

FORMULA

G.f. -x^4*(-13-8*x-13*x^2+7*x^3+14*x^4+12*x^5+8*x^6) / ( (x^3+x-1)*(x^4+x^3-1) ). - R. J. Mathar, Dec 01 2011

CROSSREFS

Sequence in context: A164447 A057200 A164454 * A164473 A164481 A164433

Adjacent sequences:  A164423 A164424 A164425 * A164427 A164428 A164429

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified November 18 12:21 EST 2017. Contains 294891 sequences.