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A164490 Number of binary strings of length n with no substrings equal to 0010 0011 or 0110 1
13, 21, 32, 50, 76, 117, 177, 270, 408, 620, 937, 1421, 2148, 3254, 4920, 7449, 11265, 17050, 25788, 39024, 59029, 89317, 135112, 204426, 309252, 467885, 707825, 1070886, 1620080, 2451028, 3708049, 5609885, 8486988, 12839854, 19425008 (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,-2,2,-1)

FORMULA

G.f. -x^4*(-13+5*x+10*x^2-12*x^3+8*x^4) / ( (x-1)*(x^4-x^3+x^2+x-1) ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164452 A164444 A164438 * A164429 A164460 A164448

Adjacent sequences:  A164487 A164488 A164489 * A164491 A164492 A164493

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified March 30 16:34 EDT 2017. Contains 284302 sequences.