A118986 Number of different values taken by the permanent of a symmetric real (0,1)-matrix of order n.

1, 2, 3, 6, 14, 46, 176, 908, 5802, 44053

Offset

0,2

Links

Table of n, a(n) for n=0..9.

Minfeng Wang, C++ program to calculate A118986

Crossrefs

Cf. A087983, A118985, A118987, A118988.

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

Sequence in context: A094468 A091285 A109459 * A091138 A335260 A090983

Adjacent sequences: A118983 A118984 A118985 * A118987 A118988 A118989

Keyword

nonn,more

Author

Giovanni Resta, May 08 2006

Extensions

a(8) from Minfeng Wang, Jun 12 2024

a(0)=1 prepended by Alois P. Heinz, Jun 12 2024

a(9) from Minfeng Wang, Jun 18 2024

Status

approved