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A164464 Number of binary strings of length n with no substrings equal to 0001 0100 or 0111 1
13, 20, 31, 47, 70, 104, 154, 227, 334, 491, 721, 1058, 1552, 2276, 3337, 4892, 7171, 10511, 15406, 22580, 33094, 48503, 71086, 104183, 152689, 223778, 327964, 480656, 704437, 1032404, 1513063, 2217503, 3249910, 4762976, 6980482, 10230395 (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).

FORMULA

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

CROSSREFS

Sequence in context: A164483 A164468 A164489 * A164467 A164505 A164484

Adjacent sequences:  A164461 A164462 A164463 * A164465 A164466 A164467

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified December 12 23:01 EST 2018. Contains 318081 sequences. (Running on oeis4.)