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A164454 Number of binary strings of length n with no substrings equal to 0001 0011 or 0101 1
13, 21, 34, 52, 79, 120, 179, 266, 395, 583, 859, 1265, 1859, 2730, 4008, 5880, 8624, 12647, 18542, 27182, 39846, 58405, 85605, 125470, 183894, 269519, 395010, 578925, 848466, 1243499, 1822447, 2670937, 3914461, 5736933, 8407896, 12322384 (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,-1,2,-3,1,-1,1).

FORMULA

G.f.  -x^4*(13-5*x+5*x^2-21*x^3+6*x^4-4*x^5+8*x^6) / ( (1+x+x^2)*(x^3+x-1)*(x-1)^2 ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164485 A164447 A057200 * A164426 A164473 A164481

Adjacent sequences:  A164451 A164452 A164453 * A164455 A164456 A164457

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified October 27 20:18 EDT 2021. Contains 348290 sequences. (Running on oeis4.)