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A164493 Number of binary strings of length n with no substrings equal to 0010 0101 or 1001 1
13, 22, 38, 65, 111, 190, 326, 559, 958, 1642, 2814, 4822, 8263, 14160, 24266, 41585, 71265, 122128, 209292, 358665, 614646, 1053322, 1805084, 3093384, 5301153, 9084622, 15568378, 26679633, 45721063, 78352486, 134273170, 230104815 (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,-1,1,0,1).

FORMULA

G.f. -x^4*(13-4*x+7*x^2-2*x^3+10*x^4+4*x^5+8*x^6) / ( -1+2*x-x^2+x^3-x^4+x^5+x^7 ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164443 A164410 A164421 * A164509 A164415 A164445

Adjacent sequences:  A164490 A164491 A164492 * A164494 A164495 A164496

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified May 23 19:46 EDT 2017. Contains 286926 sequences.