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A164417 Number of binary strings of length n with no substrings equal to 0000 0010 or 0100 1
13, 22, 39, 70, 124, 217, 381, 672, 1186, 2090, 3680, 6482, 11422, 20127, 35461, 62474, 110069, 193930, 341683, 601999, 1060637, 1868700, 3292407, 5800790, 10220220, 18006665, 31725356, 55895881, 98481140, 173510709, 305702860, 538607921 (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 (1,1,0,1,1,-1,-1).

FORMULA

G.f. -x^4*(-13-9*x-4*x^2-9*x^3-2*x^4+12*x^5+8*x^6) / ( 1-x-x^2-x^4-x^5+x^6+x^7 ). - R. J. Mathar, Nov 30 2011

CROSSREFS

Sequence in context: A164445 A164418 A164409 * A111676 A058030 A102498

Adjacent sequences:  A164414 A164415 A164416 * A164418 A164419 A164420

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified August 24 06:49 EDT 2017. Contains 291052 sequences.