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A164497 Number of binary strings of length n with no substrings equal to 0010 0110 or 1011 1
13, 21, 34, 54, 87, 140, 227, 368, 597, 967, 1565, 2531, 4093, 6620, 10710, 17330, 28044, 45381, 73432, 118816, 192244, 311049, 503279, 814318, 1317598, 2131931, 3449554, 5581509, 9031072, 14612565, 23643597, 38256113, 61899677, 100155797 (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,-2,1,1).

FORMULA

G.f. -x^4*(13-5*x-8*x^2+12*x^3+8*x^4) / ( (x^2+x-1)*(x^3-x+1) ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164433 A164479 A164431 * A164503 A067516 A164449

Adjacent sequences:  A164494 A164495 A164496 * A164498 A164499 A164500

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified October 16 20:36 EDT 2021. Contains 348047 sequences. (Running on oeis4.)