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A089476 Number of different values taken by the permanent of a real singular (0,1)-matrix of order n. 2

%I

%S 1,2,4,10,32,136

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

%e 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.

%Y 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.

%K hard,nonn

%O 1,2

%A _Hugo Pfoertner_, Nov 11 2003

%E a(6) from _Jaap Spies_, Nov 28 2003

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Last modified August 4 14:04 EDT 2020. Contains 336201 sequences. (Running on oeis4.)