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!)
A097925 Number of (n,3) Freiman-Wyner sequences. 2
7, 12, 23, 42, 78, 142, 262, 482, 887, 1630, 2999, 5516, 10146, 18660, 34322, 63128, 116111 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,1

COMMENTS

"The values for n <= 3 are straightforward."

REFERENCES

I. F. Blake, The enumeration of certain run length sequences, Information and Control, 55 (1982), 222-237.

LINKS

Table of n, a(n) for n=4..20.

FORMULA

Appears to satisfy a linear recurrence with characteristic polynomial (1+x)(1+x^2)(1-x-x^2-x^3). - Ralf Stephan, Dec 04 2004

CROSSREFS

Cf. A006355, A097926.

Sequence in context: A160423 A252652 A192752 * A132195 A076852 A011996

Adjacent sequences: A097922 A097923 A097924 * A097926 A097927 A097928

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Sep 05 2004

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 November 29 18:13 EST 2022. Contains 358431 sequences. (Running on oeis4.)