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A164419 Number of binary strings of length n with no substrings equal to 0000 0010 or 0110 1
13, 21, 33, 55, 92, 156, 260, 433, 717, 1193, 1985, 3310, 5512, 9180, 15277, 25433, 42337, 70495, 117368, 195416, 325336, 541649, 901769, 1501361, 2499601, 4161594, 6928588, 11535360, 19205085, 31974413, 53233921, 88628791, 147557332 (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 (1,1,-1,1,1,1).

FORMULA

G.f. -x^4*(13+8*x-x^2+14*x^3+12*x^4+8*x^5)/ ( -1+x+x^2-x^3+x^4+x^5+x^6 ). - R. J. Mathar, Nov 30 2011

CROSSREFS

Sequence in context: A164498 A164485 A164447 * A057200 A164454 A164426

Adjacent sequences:  A164416 A164417 A164418 * A164420 A164421 A164422

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified August 20 11:41 EDT 2017. Contains 290835 sequences.