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A164471 Number of binary strings of length n with no substrings equal to 0001 0101 or 1000 2
13, 21, 35, 59, 99, 167, 283, 479, 811, 1375, 2331, 3951, 6699, 11359, 19259, 32655, 55371, 93887, 159195, 269935, 457707, 776095, 1315963, 2231375, 3783563, 6415487, 10878235, 18445359, 31276331, 53032799, 89923515, 152476175, 258541771 (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,-2).

FORMULA

G.f. -x^4*(-13+5*x-6*x^2+16*x^3) / ( (x-1)*(2*x^3+x-1) ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164459 A164453 A164465 * A164477 A164423 A164422

Adjacent sequences:  A164468 A164469 A164470 * A164472 A164473 A164474

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified August 3 08:21 EDT 2021. Contains 346435 sequences. (Running on oeis4.)