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A164492 Number of binary strings of length n with no substrings equal to 0010 0101 or 0110 1
13, 21, 34, 56, 93, 155, 259, 432, 719, 1195, 1986, 3302, 5492, 9136, 15198, 25281, 42051, 69943, 116335, 193500, 321852, 535345, 890454, 1481114, 2463569, 4097704, 6815793, 11336848, 18856817, 31364944, 52169978, 86775429, 144335401 (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,-1,0,1,0,0,1).

FORMULA

G.f. -x^4*(13-5*x+5*x^2+9*x^3+2*x^4+4*x^5+8*x^6) / ( -1+2*x-x^2+x^4+x^7 ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A067516 A164449 A164439 * A164451 A164432 A034292

Adjacent sequences:  A164489 A164490 A164491 * A164493 A164494 A164495

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified June 28 05:07 EDT 2017. Contains 288813 sequences.