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A164502 Number of binary strings of length n with no substrings equal to 0010 1011 or 1100 1
13, 20, 31, 48, 74, 114, 176, 272, 421, 652, 1010, 1564, 2421, 3746, 5795, 8964, 13867, 21454, 33196, 51368, 79490, 123006, 190339, 294520, 455714, 705124, 1091037, 1688172, 2612149, 4041868, 6254143, 9677284, 14974018, 23169790, 35851304 (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 (2,0,-2,1,0,1).

FORMULA

G.f. -x^4*(13-6*x-9*x^2+12*x^3+5*x^4+8*x^5) / ( -1+2*x-2*x^3+x^4+x^6 ). - R. J. Mathar, Jan 19 2011

CROSSREFS

Sequence in context: A164467 A164505 A164484 * A164474 A164478 A164463

Adjacent sequences:  A164499 A164500 A164501 * A164503 A164504 A164505

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

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Last modified September 20 10:51 EDT 2021. Contains 347584 sequences. (Running on oeis4.)