A089476 Number of different values taken by the permanent of a real singular (0,1)-matrix of order n.

1, 2, 4, 10, 32, 136

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Example

a(4)=10 because the permanents of singular (0, 1)-matrices can take the values 0, 2, 4, 6, 8, 10, 12, 14, 18, 24.

Crossrefs

A089475 gives different permanents of nonsingular (0, 1)-matrices, A089481 occurrence counts for permanents of singular (0, 1)-matrices, A087983 different permanents of all (0, 1)-matrices.

Sequence in context: A056593 A154219 A173489 * A323207 A327424 A220028

Adjacent sequences: A089473 A089474 A089475 * A089477 A089478 A089479

Keyword

hard,nonn

Author

Hugo Pfoertner, Nov 11 2003

Extensions

a(6) from Jaap Spies, Nov 28 2003

Status

approved