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A164481 Number of binary strings of length n with no substrings equal to 0001 0110 or 1101 1
13, 21, 34, 53, 84, 131, 204, 318, 493, 766, 1188, 1842, 2857, 4428, 6865, 10641, 16493, 25565, 39623, 61414, 95187, 147531, 228662, 354404, 549295, 851357, 1319523, 2045140, 3169774, 4912854, 7614464, 11801703, 18291535, 28350160, 43940087 (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,-1,-1,2,-1).

FORMULA

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

CROSSREFS

Sequence in context: A164454 A164426 A164473 * A164433 A164479 A164431

Adjacent sequences:  A164478 A164479 A164480 * A164482 A164483 A164484

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified September 25 18:05 EDT 2017. Contains 292499 sequences.