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A089475
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Number of different values taken by the permanent of a real nonsingular (0,1)-matrix of order n.
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3
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OFFSET
| 1,3
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COMMENTS
| This sequence was first provided by Jaap Spies (j.spies(AT)hccnet.nl).
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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.
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CROSSREFS
| A055165, A089480 give occurrence counts for permanents of non-singular (0, 1)-matrices, A089476 different permanents of singular (0, 1)-matrices.
Sequence in context: A090595 A027040 A111063 * A099999 A039749 A034538
Adjacent sequences: A089472 A089473 A089474 * A089476 A089477 A089478
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KEYWORD
| more,nonn
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AUTHOR
| Hugo Pfoertner (hugo(AT)pfoertner.org), Nov 11 2003
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EXTENSIONS
| a(6) from Jaap Spies (j.spies(AT)hccnet.nl), Nov 12 2003
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