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A089476 Number of different values taken by the permanent of a real singular (0,1)-matrix of order n. 2
1, 2, 4, 10, 32, 136 (list; graph; refs; listen; history; text; internal format)
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 A220028 A006397

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

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Last modified May 21 22:24 EDT 2019. Contains 323467 sequences. (Running on oeis4.)