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A164472 Number of binary strings of length n with no substrings equal to 0001 0101 or 1010 1
13, 22, 37, 61, 101, 167, 276, 456, 753, 1244, 2055, 3394, 5606, 9260, 15295, 25263, 41728, 68924, 113844, 188040, 310593, 513018, 847370, 1399632, 2311824, 3818524, 6307195, 10417825, 17207503, 28422261, 46946087, 77542569, 128079896 (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 (1,0,2,0,0,-1).

FORMULA

G.f. -x^4*(-13-9*x-15*x^2+2*x^3+4*x^4+8*x^5) / ( 1-x-2*x^3+x^6 ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A159302 A172187 A164412 * A164446 A164506 A164440

Adjacent sequences:  A164469 A164470 A164471 * A164473 A164474 A164475

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified July 28 11:20 EDT 2021. Contains 346326 sequences. (Running on oeis4.)