login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A091849 Maximal size of (n,4,2) optical orthogonal code. 0
1, 1, 1, 3, 3, 3, 4, 6, 7, 8, 9, 11, 12, 14, 15, 17, 18 (list; graph; refs; listen; history; text; internal format)
OFFSET

7,4

COMMENTS

Conjectured to agree with A091848 except for n = 9 and 13.

LINKS

Table of n, a(n) for n=7..23.

W. Chu and C. J. Colbourn, Optimal (n,4,2)-OCC of small orders, Discrete Math., 279 (2004), 163-172.

CROSSREFS

Cf. A091848.

Sequence in context: A167025 A238505 A259897 * A035567 A219328 A108688

Adjacent sequences:  A091846 A091847 A091848 * A091850 A091851 A091852

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Mar 13 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 25 06:32 EDT 2020. Contains 337335 sequences. (Running on oeis4.)