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A164500 Number of binary strings of length n with no substrings equal to 0010 1001 or 1010 1
13, 21, 36, 60, 100, 168, 281, 470, 787, 1317, 2204, 3689, 6174, 10333, 17294, 28944, 48442, 81075, 135691, 227099, 380084, 636127, 1064653, 1781855, 2982199, 4991153, 8353436, 13980716, 23398805, 39161376, 65542380, 109694909, 183590725 (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,-1,1,-1,1).

FORMULA

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

CROSSREFS

Sequence in context: A164477 A164423 A164422 * A164430 A045679 A137194

Adjacent sequences:  A164497 A164498 A164499 * A164501 A164502 A164503

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified September 27 21:12 EDT 2021. Contains 347698 sequences. (Running on oeis4.)