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A164400 Number of binary strings of length n with no substrings equal to 0001 or 1100 1
14, 24, 41, 70, 120, 206, 354, 609, 1048, 1804, 3106, 5348, 9209, 15858, 27308, 47026, 80982, 139457, 240156, 413568, 712198, 1226464, 2112073, 3637166, 6263504, 10786278, 18574874, 31987489, 55085136, 94861220, 163358970, 281317836 (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 (2,0,0,-2,1).

FORMULA

G.f. -x^4*(14-4*x-7*x^2-12*x^3+8*x^4) / ( (x-1)*(x^4-x^3-x^2-x+1) ). - R. J. Mathar, Nov 28 2011

CROSSREFS

Sequence in context: A164399 A164396 A164404 * A164405 A164395 A164394

Adjacent sequences:  A164397 A164398 A164399 * A164401 A164402 A164403

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified March 24 21:42 EDT 2017. Contains 283996 sequences.