Number of symmetric n X n (+1,-1)-matrices over the reals with zero permanent.
A119010
Number of symmetric n X n (+1,-1)-matrices over the reals with zero permanent.
Terms
- a(0) =0a(1) =4a(2) =0a(3) =192a(4) =8960a(5) =371200a(6) =0a(7) =4081029120
External references
- oeis: A119010