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A164418 Number of binary strings of length n with no substrings equal to 0000 0010 or 0101 1
13, 22, 38, 66, 115, 200, 347, 601, 1042, 1808, 3137, 5442, 9440, 16375, 28405, 49274, 85476, 148275, 257211, 446181, 773986, 1342627, 2329044, 4040173, 7008453, 12157502, 21089513, 36583796, 63461595, 110086280, 190965717, 331266576 (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 (1,0,1,1,1,1,1).

FORMULA

G.f. -x^4*(13+9*x+16*x^2+15*x^3+14*x^4+12*x^5+8*x^6) / ( (x^2-x+1)*(x^5+2*x^4+2*x^3+x^2-1) ). - R. J. Mathar, Nov 30 2011

CROSSREFS

Sequence in context: A164509 A164415 A164445 * A164409 A164417 A111676

Adjacent sequences:  A164415 A164416 A164417 * A164419 A164420 A164421

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified June 22 23:15 EDT 2017. Contains 288633 sequences.