A118985 Number of different values taken by the determinant of a symmetric real (0,1)-matrix of order n.

1, 2, 3, 5, 7, 11, 19, 40, 91, 214, 577

Offset

0,2

Links

Table of n, a(n) for n=0..10.

Minfeng Wang, C++ program

Crossrefs

Cf. A089472, A108150, A118987, A118986, A373915, A373916.

Cf. A006125 (number of symmetric real (0,1)-matrices of order (n-1)).

Sequence in context: A065726 A215161 A227907 * A092728 A089769 A033274

Adjacent sequences: A118982 A118983 A118984 * A118986 A118987 A118988

Keyword

nonn,hard,more

Author

Giovanni Resta, May 08 2006

Extensions

a(0)=1 prepended by Alois P. Heinz, Mar 16 2019

a(8) from Minfeng Wang, Jun 11 2024

a(9) from Minfeng Wang, Jun 12 2024

a(10) from Hugo Pfoertner, Jun 25 2024

Status

approved