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A164406 Number of binary strings of length n with no substrings equal to 0011 or 0101 2
14, 24, 41, 68, 111, 180, 289, 460, 728, 1146, 1795, 2800, 4352, 6742, 10414, 16044, 24659, 37818, 57885, 88440, 134899, 205448, 312448, 474548, 719861, 1090734, 1650908, 2496260, 3770910, 5691360, 8582653, 12932512, 19472363, 29298540 (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,-1,2,-2,0,-1).

FORMULA

G.f. -x^4*(-14+4*x-7*x^2+18*x^3+4*x^4+8*x^5) / (x^3+x-1)^2 . - R. J. Mathar, Nov 30 2011

CROSSREFS

Sequence in context: A046290 A111743 A164402 * A164397 A164399 A164396

Adjacent sequences:  A164403 A164404 A164405 * A164407 A164408 A164409

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified August 17 23:58 EDT 2017. Contains 290682 sequences.