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A164486 Number of binary strings of length n with no substrings equal to 0001 1001 or 1011 1
13, 20, 28, 38, 49, 62, 76, 92, 109, 128, 148, 170, 193, 218, 244, 272, 301, 332, 364, 398, 433, 470, 508, 548, 589, 632, 676, 722, 769, 818, 868, 920, 973, 1028, 1084, 1142, 1201, 1262, 1324, 1388, 1453, 1520, 1588, 1658, 1729, 1802, 1876, 1952, 2029, 2108, 2188 (list; graph; refs; listen; history; internal format)
OFFSET

4,1

LINKS

R. H. Hardin, Table of n, a(n) for n=4..500

Index to sequences with linear recurrences with constant coefficients, signature (2,0,-2,1).

FORMULA

G.f. -x^4*(13-6*x-12*x^2+8*x^3) / ( (1+x)*(x-1)^3 ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A098956 A014158 A171143 * A164482 A058016 A096277

Adjacent sequences:  A164483 A164484 A164485 * A164487 A164488 A164489

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Aug 14 2009

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Last modified February 16 11:51 EST 2012. Contains 205908 sequences.