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A164422 Number of binary strings of length n with no substrings equal to 0000 0010 or 1010 1
13, 21, 35, 60, 102, 171, 287, 484, 817, 1377, 2319, 3907, 6585, 11098, 18701, 31512, 53102, 89486, 150797, 254112, 428212, 721597, 1215992, 2049113, 3453034, 5818835, 9805537, 16523676, 27844658, 46922064, 79070112, 133243983, 224534381 (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 (1,0,1,1,1).

FORMULA

G.f. -x^4*(13+8*x+14*x^2+12*x^3+8*x^4) / ( -1+x+x^3+x^4+x^5 ). - R. J. Mathar, Dec 01 2011

CROSSREFS

Sequence in context: A164471 A164477 A164423 * A164500 A164430 A045679

Adjacent sequences:  A164419 A164420 A164421 * A164423 A164424 A164425

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified August 19 14:06 EDT 2017. Contains 290808 sequences.