Number of symmetric singular n X n (+1,-1) matrices over the reals.
A118990
Number of symmetric singular n X n (+1,-1) matrices over the reals.
Terms
- a(0) =0a(1) =4a(2) =32a(3) =512a(4) =15872a(5) =907008a(6) =104535552a(7) =22523623424
External references
- oeis: A118990