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A164469 Number of binary strings of length n with no substrings equal to 0001 0101 or 0110 1
13, 20, 32, 51, 81, 128, 201, 316, 497, 781, 1227, 1927, 3026, 4752, 7462, 11717, 18398, 28888, 45359, 71221, 111828, 175587, 275698, 432887, 679697, 1067225, 1675701, 2631098, 4131212, 6486612, 10184937, 15991852, 25109564, 39425715, 61904181 (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,-1).

FORMULA

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

CROSSREFS

Sequence in context: A164478 A164463 A164470 * A164462 A132946 A278470

Adjacent sequences:  A164466 A164467 A164468 * A164470 A164471 A164472

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified August 6 00:36 EDT 2021. Contains 346493 sequences. (Running on oeis4.)