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A164479 Number of binary strings of length n with no substrings equal to 0001 0110 or 1011 1
13, 21, 34, 54, 85, 133, 207, 322, 500, 776, 1204, 1867, 2895, 4488, 6957, 10784, 16715, 25908, 40156, 62239, 96466, 149514, 231734, 359167, 556676, 862797, 1337255, 2072621, 3212369, 4978871, 7716784, 11960291, 18537329, 28731120, 44530538 (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,-1,-1,2,-1).

FORMULA

G.f. -x^4*(-13+5*x+8*x^2+x^3-11*x^4+8*x^5) / ( (x-1)*(x^5-x^4+x^2+x-1) ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164473 A164481 A164433 * A164431 A164497 A164503

Adjacent sequences:  A164476 A164477 A164478 * A164480 A164481 A164482

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified April 18 16:51 EDT 2021. Contains 343089 sequences. (Running on oeis4.)