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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A226004 Number of pairs of orthogonal (-6,7) vectors of length 13*n. 1
164736, 73201966489600, 2521184924824165416960, 178483804896209887617477509120, 10141070492754733571346654771749584896, 628258815066107432786230672181689099642470400 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 18 of A225987.
LINKS
EXAMPLE
Some solutions for n=1
.-6..7...-6.-6...-6..7...-6.-6...-6..7...-6.-6...-6..7...-6..7...-6..7...-6.-6
..7.-6...-6..7...-6..7...-6.-6...-6..7...-6.-6...-6..7...-6.-6...-6..7...-6..7
..7..7....7.-6....7..7...-6..7...-6..7...-6.-6...-6.-6....7.-6....7..7...-6.-6
..7..7...-6.-6....7..7....7.-6....7..7...-6..7...-6.-6...-6.-6....7..7...-6.-6
.-6..7...-6.-6....7..7...-6..7....7.-6...-6.-6...-6.-6...-6..7....7.-6...-6..7
..7..7...-6..7....7.-6....7.-6....7..7...-6.-6...-6..7...-6..7....7..7....7.-6
..7..7...-6..7....7..7...-6.-6...-6..7...-6..7...-6.-6...-6.-6....7..7...-6.-6
.-6..7...-6.-6...-6..7...-6.-6....7.-6....7.-6....7.-6...-6..7....7..7...-6.-6
..7..7...-6.-6...-6..7...-6.-6....7..7....7.-6...-6.-6...-6..7...-6..7...-6.-6
.-6..7...-6..7....7.-6...-6.-6....7..7...-6.-6....7.-6...-6.-6...-6..7....7.-6
..7.-6...-6.-6....7..7....7.-6....7..7...-6..7...-6.-6...-6.-6....7.-6...-6.-6
..7..7...-6.-6...-6..7...-6.-6....7.-6...-6.-6...-6..7...-6.-6...-6..7...-6..7
..7.-6....7.-6....7..7....7.-6....7..7...-6..7...-6.-6...-6.-6....7..7....7.-6
CROSSREFS
Sequence in context: A196675 A034603 A234680 * A233705 A233706 A233701
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 22 2013
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 April 24 13:08 EDT 2024. Contains 371945 sequences. (Running on oeis4.)