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A164453 Number of binary strings of length n with no substrings equal to 0001 0011 or 0100 1
13, 21, 35, 58, 97, 163, 273, 457, 765, 1280, 2142, 3585, 6000, 10042, 16807, 28129, 47078, 78792, 131870, 220704, 369381, 618214, 1034673, 1731679, 2898222, 4850605, 8118208, 13587027, 22739908, 38058614, 63696744, 106605963, 178420915 (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+6*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: A163113 A164496 A164459 * A164465 A164471 A164477

Adjacent sequences:  A164450 A164451 A164452 * A164454 A164455 A164456

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified September 18 10:35 EDT 2021. Contains 347518 sequences. (Running on oeis4.)