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A164494 Number of binary strings of length n with no substrings equal to 0010 0101 or 1010 1
13, 23, 40, 70, 123, 216, 379, 665, 1167, 2048, 3594, 6307, 11068, 19423, 34085, 59815, 104968, 184206, 323259, 567280, 995507, 1746993, 3065759, 5380032, 9441298, 16568323, 29075380, 51023735, 89540413, 157132471, 275748264, 483904470 (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)

FORMULA

G.f. -x^4*(13-3*x+7*x^2) / ( -1+2*x-x^2+x^3 ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164416 A164491 A164434 * A164407 A259216 A135283

Adjacent sequences:  A164491 A164492 A164493 * A164495 A164496 A164497

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified June 25 00:41 EDT 2017. Contains 288708 sequences.