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!)
A118996 Number of real n X n symmetric (0,1) matrices with negative determinant. 2
0, 3, 27, 190, 4410, 753592, 127793708 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A248225 A251732 A145241 * A267947 A230170 A043023
KEYWORD
nonn,more
AUTHOR
Giovanni Resta, May 08 2006
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 July 23 23:47 EDT 2024. Contains 374575 sequences. (Running on oeis4.)