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A118993 Number of real n X n symmetric (+1,-1) matrices with nonzero permanent. 1

%I #2 Mar 30 2012 17:40:41

%S 2,4,64,832,23808,1725952,268435456

%N Number of real n X n symmetric (+1,-1) matrices with nonzero permanent.

%Y Cf. A086899, A119010.

%K nonn,more

%O 1,1

%A _Giovanni Resta_, May 08 2006

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Last modified July 15 11:01 EDT 2024. Contains 374332 sequences. (Running on oeis4.)