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A164501 Number of binary strings of length n with no substrings equal to 0010 1001 or 1100 1
13, 22, 37, 62, 105, 177, 300, 508, 861, 1459, 2472, 4188, 7094, 12016, 20352, 34471, 58385, 98890, 167497, 283703, 480532, 813919, 1378606, 2335065, 3955101, 6699093, 11346824, 19219079, 32552984, 55137750, 93391486, 158185089, 267931521 (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,-1,0,0,0,1).

FORMULA

G.f. -x^4*(13-4*x-7*x^2+x^3+3*x^4+4*x^5+8*x^6) / ( -1+2*x-x^3+x^7 ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164437 A164435 A164425 * A164495 A164427 A164414

Adjacent sequences:  A164498 A164499 A164500 * A164502 A164503 A164504

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified November 20 20:56 EST 2019. Contains 329347 sequences. (Running on oeis4.)