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A164492 Number of binary strings of length n with no substrings equal to 0010 0101 or 0110. 1
13, 21, 34, 56, 93, 155, 259, 432, 719, 1195, 1986, 3302, 5492, 9136, 15198, 25281, 42051, 69943, 116335, 193500, 321852, 535345, 890454, 1481114, 2463569, 4097704, 6815793, 11336848, 18856817, 31364944, 52169978, 86775429, 144335401 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,1
LINKS
FORMULA
G.f.: -x^4*(13-5*x+5*x^2+9*x^3+2*x^4+4*x^5+8*x^6) / ( -1+2*x-x^2+x^4+x^7 ). - R. J. Mathar, Jan 19 2011
CROSSREFS
Sequence in context: A164503 A164449 A164439 * A164451 A164432 A034292
KEYWORD
nonn,easy
AUTHOR
R. H. Hardin, Aug 14 2009
STATUS
approved

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Last modified July 25 11:18 EDT 2024. Contains 374588 sequences. (Running on oeis4.)