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A164440 Number of binary strings of length n with no substrings equal to 0000 0110 or 1011 1
13, 22, 37, 62, 104, 174, 291, 487, 815, 1364, 2283, 3821, 6395, 10703, 17913, 29980, 50176, 83977, 140548, 235228, 393689, 658897, 1102762, 1845636, 3088946, 5169810, 8652445, 14481152, 24236359, 40563147, 67888452, 113621409, 190162306 (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,-1,1,-1,1).

FORMULA

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

CROSSREFS

Sequence in context: A164472 A164446 A164506 * A164437 A164435 A164425

Adjacent sequences:  A164437 A164438 A164439 * A164441 A164442 A164443

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified December 10 20:55 EST 2018. Contains 318049 sequences. (Running on oeis4.)