login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A164438 Number of binary strings of length n with no substrings equal to 0000 0110 or 0111 1
13, 21, 32, 49, 73, 109, 161, 238, 350, 515, 756, 1110, 1628, 2388, 3501, 5133, 7524, 11029, 16165, 23693, 34725, 50894, 74590, 109319, 160216, 234810, 344132, 504352, 739165, 1083301, 1587656, 2326825, 3410129, 4997789, 7324617, 10734750 (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 (1,1,0,0,-1).

FORMULA

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

CROSSREFS

Sequence in context: A164458 A164452 A164444 * A164490 A164460 A164448

Adjacent sequences: A164435 A164436 A164437 * A164439 A164440 A164441

KEYWORD

nonn

AUTHOR

R. H. Hardin Aug 14 2009

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 6 11:56 EST 2022. Contains 358633 sequences. (Running on oeis4.)