login
A118996
Number of real n X n symmetric (0,1) matrices with negative determinant.
2
0, 3, 27, 190, 4410, 753592, 127793708
OFFSET
1,2
CROSSREFS
Sequence in context: A248225 A251732 A145241 * A267947 A230170 A043023
KEYWORD
nonn,more
AUTHOR
Giovanni Resta, May 08 2006
STATUS
approved