A089475 - OEIS

A089475

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

1, 1, 3, 9, 31, 149

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

COMMENTS

This sequence was first provided by Jaap Spies.

LINKS

EXAMPLE

a(4)=9 because the permanents of non-singular 4 X 4 (0,1)-matrices can take the

values 1,2,..,7,9,11.

CROSSREFS

A055165, A089480 give occurrence counts for permanents of non-singular (0, 1)-matrices, A089476 different permanents of singular (0, 1)-matrices.

KEYWORD

more,nonn

AUTHOR

EXTENSIONS

a(6) from Jaap Spies, Nov 12 2003

STATUS

approved