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A119009
Number of n X n real symmetric (0,1)-matrices with permanent = 1.
1
1, 4, 22, 286, 5126, 190096, 9477868
OFFSET
1,2
CROSSREFS
Sequence in context: A195227 A265908 A359111 * A326883 A317803 A053722
KEYWORD
nonn,more
AUTHOR
Giovanni Resta, May 08 2006
STATUS
approved