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A164496 Number of binary strings of length n with no substrings equal to 0010 0110 or 1001 1
13, 21, 35, 58, 96, 159, 264, 438, 727, 1206, 2001, 3319, 5506, 9133, 15151, 25133, 41694, 69165, 114739, 190338, 315752, 523795, 868921, 1441440, 2391195, 3966724, 6580367, 10916098, 18108619, 30040197, 49833403, 82668121, 137137355 (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,-2,2,-1,1)

FORMULA

G.f. -x^4*(13-5*x-7*x^2+14*x^3-4*x^4+8*x^5) / ( -1+2*x-2*x^3+2*x^4-x^5+x^6 ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164432 A034292 A163113 * A164459 A164453 A164465

Adjacent sequences:  A164493 A164494 A164495 * A164497 A164498 A164499

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified April 10 19:06 EDT 2021. Contains 342853 sequences. (Running on oeis4.)